My female cat, Samson, is just over a year old and went into heat for the first time last early last month but is showing no signs of pregnancy, and also not going back into heat. What is troubling is that her nipples,4 or 5 of them are swollen enough that the extra fat under her belly hangs (like a nursing cat does) and are firm, some a dark pink and around two of them are a purple-ish colour. She hasn't been cut around or on them then just began to swell around 2 or 3 weeks after she had been mated with. Samson is half-feral and only recently became affectionate with me so any chances of picking her up are nil. I've gently squeezed one of the swollen nipples today while she was eating and she's shown no sign of discomfort, I applied a bit more pressure and she still showed no sign of it hurting. Google says it could be cancer or mastitis. Has anyone ever experienced this with their cat? Additional notes: I'm a uni student so money is an issue for me. The RSPCA in my country is super expensive, almost or the same price as a private vet and it does not do pick-ups for whatever reason so that is out of the question.