Tender breast ?

I’m on my second month of birth control and now my boobs are tender on the sides towards the bottom, is this normal ? Could I be pregnant ? I did have sex with my boyfriend but we used a condom (this was 2 1/2 weeks ago) but he didn’t cum and kept going soft when getting the condom on. (I did check for holes didn’t see any) -Reason why i’m asking because he might of put his dick on both sides of the condom so a very small amount of pre ejaculation could’ve got on it but i was on my placebo week and i only had 3 pills left to hitting a month after we did that- are my tender breast a side effect from my birth control ? Or could i be preggo ?