Sorry this is so long, but I've tried to include a lot of info.
A few things. You need to keep food out for her 24/7, and she needs kitten food. If you feed her regular canned food once or twice a day, at least keep a bowl filled with dry kitten food for her at all times near the box along with her water. Nursing (especially all those kittens) takes a lot of energy from her, and she needs the extra calories and protein. And keep the litter not too far from where she is for now, because she might be stressed by having to travel too far, and out of the sight of her babies.
Just make sure the area she's in with the kittens is warm and not in direct strong light (a simple cover over the box she's in is perfect, even if it's cardboard).
The first few days she will stay with them most of the time. She probably doesn't want to leave her babies just yet and she's exhausted. She'll know when she needs a break. (if you're really concerned, for today, put some of her food in a small bowl and put it next to her. When my cat had hers, the first day I did that and she did eat a little just laying there. After that, she came out to eat when she needed to.
There is a chance one of the reasons she is not wanting to leave is because there is a Tom in the house. Please try to keep them separate for a week or two, it's a lot better for Mom, who won't be as stressed.
You can give her a quick wipe up with a paper towel dampened with warm water if you want to, but if she's always been able to clean herself, when she gets some strength back, she'll take care of herself and the babies. I chose to not bother with Deja Vu because I figured she was uncomfortable enough after 5 kittens, and she did eventually clean herself up. But with the longer fur, it might be different.
You might consider getting a pair of baby scissors (dull at the tips) and trimming the fur around her bottom area to make life a bit more comfortable for her these days.
It was a good idea to give her some fresh bedding. After the first change, what I did worked very well for me, and was not very difficult, so perhaps it might be a good idea for you. Fold a couple of towels up to fit in the bottom of the box (if the area is too soft, the kittens will have a harder time moving around. I found the towels perfect). Then I covered those towels with 3 layers of paper towels. All i had to do each day was change the paper towels once (lots less laundry and bending). Just wait until the Mom leaves the box to eat or use the litter and take that opportunity to quickly remove the kittens from the box, remove the old paper towels, and replace them with the fresh ones). Mom is going to be licking them to make them go to the bathroom, and ingesting it, so she will keep the area very clean. Chances are you will not have to change the cloth towels at all if the paper towel layers are there and changed once a day. It was very easy.
And do wait until she leaves, especially since she seems to have some problems and so many kittens. You want her as calm as possible, and moving them around while she's in the box could have a tendency to stress her a bit.
Just watch her to make sure she eats by tomorrow and that the kittens are nursing well. They should be sleeping peacefully after they eat. If they seem to be crying a lot and not sleeping well, that's usually a sign they are not getting enough food, so you will probably need to supplement with KMR (which I recommend having on hand just in case. With 8, you'll probably have to help a bit, even if its once a day (I had one litter I had to do twice because Mom had been very weak and had 6 kittens -- she took care of most of it, and I gave them a little with the bottle in the a.m. and p.m. It was a perfect partnership and the kittens thrived).
After reading your situation, I am wondering if maybe the whole thing is too much for you right now (for no other reason than you being pregnant and your hubby being away, and you having so much responsibility and work to do).
If you feel this is the case, you do have an option of calling a no-kill rescue group. They can take Mom and the kittens, they will have them all checked by a vet, and they will place them into a good, checked-out foster home until they are ready to be given to good homes.
I'd even bet that they would work something out with you that they return Mom to you spayed once the kittens are up for adoption (which would be at 8 weeks old).
If you feel that it's not too much for you, contact them anyway. They can take the kittens and get them into good homes for you once they are 8 weeks old, and still most liekly will help you by having her spayed, and with shots and s/n for the kittens too. They are great, these groups and are very picky about the homes they send the babies to.
If you want to look into the places in your area, go to www.petfinder.com
In the upper right hand area click on shelter and rescue groups, then put in your state, and you'll get a list of all the rescues and shelters near you. Really, the rescue groups are very dedicated. I do fostering myself for the one who helped me with Deja Vu and her kittens.
I wish you luck, and I give you credit for all you're taking on.