The last month I've thought my cat is pregnant, but her nipples haven't swollen up. She's been very affectionate and all she wants is pats, her stomach is also fairly round, any advice on how I could find out without the vet bills aha?
I'm afraid you will need to visit the vet to confirm your suspicion. Has she been exposed to a male feline while she was in heat? If your answer is yes, then I would guess that she is, indeed, pregnant.