So my boyfriend and I have a very safe birth control plan (I'm on the pill and he always wears condoms) none of the condoms have broken but he's a little concerned saying he thinks he saw sperm come up towards his shaft in the condom and that it might've leaked out in me while we were having sex. At first I thought he was being paranoid/crazy and figured that even if that did happen that we would be covered with the pill..but for the past three days my boobs have been sore which isn't a regular period symptom for me. I'm not late for my period and I'm due for it Tuesday, but should I be worried?? Could I be pregnant or am I just overthinking it and my boobs being sore is just me pmsing?