Skin Infection?

My family got a new kitten about a month ago, she's about 5 months old now. She has slight bumps on the front of her body--on her front leg, on the bridge of her nose, behind her ears, and around her collar region. They're kind of crusty and sometimes scabby but the fur is there. New bumps pop up every couple of days. We kind of thought they were just allergies and were just gonna finish this batch of food, start her on a new one and see how that works.

But now the corner of one her eyes is red, she has what looks like scrapes between her ear/eyes (though that might just be from rough housing with our other cat, who is generally very nice to her but sometimes they exchange swipes), and her nose is always full of crusty snot.

I'm 20 and I'm housesitting while my parents are on vacation (along with our car), so I need to know how urgent this is. If it's urgent, I'll take an uber and go to the vet as soon as possible. If not, my parents come home Friday and the local vet is open on Saturday mornings.

Other details:

• We had to wait an extra week before adopting her because she had a fever and her foster mom wanted to keep her longer. Could this be related? That was over a month ago but she's had bumps for almost as long as we've had her.
• She had worms but they've been treated and it's been over two weeks, so the meds should have worked. I've seen no worms in her stool since.
• Alarmed by the scrapes on her face, I checked the rest of her body and find a small wound--not bloody--on one of her back paws, is that relevant?

I feel like such a terrible pet owner. All of the cats in our family normally live to 20+ years old but we recently lost a cat at only 15 (which is the reason why we got the kitten), so I feel hyper aware of how delicate cats can be and how sudden illness can overwhelm a cat. I should have done something sooner, right?

I want to also note: Luna the kitten has been behaving fairly normally. She doesn't limp. I've never seen her scratch at any of the bumps. She eats normally. She's very active and loves to cuddle (unless she isn't in the mood, then she'll loudly let you know). She drinks plenty of water. The only other issue is sometimes her eyes twitch?? Is that related?

Sorry for double posting, I'm just so concerned. The loss of our other cat is still heavy on my heart because her death was so sudden and her symptoms were so subtle at first, so my brain keeps telling me anything is possible.

There is no way to tell what these bumps are, but certainly when your parents get back home with the car, I would get her in to be checked.  It's a good thing she isn't scratching at them...that seems like a good sign.  If it were a food allergy, I think she'd really be itchy.   But the fact that they are kind of crusty and scabby is odd if she's not scratching at them...might be some kind of fungus perhaps.  . 

Well, as long as she's eating, drinking, peeing, pooping and otherwise acting like a normal kitten, I think it's safe to wait until Saturday.

BTW, I'm sorry about the loss of your other cat.  You should take pride in the fact that most of your cats have lived to be 20+ years old.  My goodness, I've never had a cat live that long.  My oldest cat recently died at age 16.   But no matter their age, it's always devastating to lose them