Pregnat Cat does a thing like she wants to spit something

My one year old cat has been pregnat for like more than a month and a half(idk exactly) and everything has been going fine, until yesterday. Because of her pregnacy she was very inactive, but yesterday she barely moved at all and today she does not even turn to look at me when I speak to her. She drinks LOTS OF Water but that is just some backround. What got me concerned is that she acts like she wants to spit something and does that for like a few seconds, then stops and about one hour later does it again. When she does it, her fur under her mouth is like lowering, like hanging((sorry can't really explain it)). Is it normal for a cat pregnacy? She does not exhibit any virus symptoms as far as I am concerned and her food is  high quality food.

PS: I can only take my cat to the VET tommorow and I have been really nervous about her.

This isn't normal for a pregnant cat.   Does she normally do this when she has a hairball?  The vet is probably a good idea.

How do you know she is pregnant?

Pregnancy in cats lasts 65-68 days, so it's not time for kittens yet. Is she eating wet food? I also think you should have her checked out by a vet. Let us know how she's doing!

Were you able to go to a vet?