Breast tenderness

Does anyones boobs just get randomly sore like out of the blue? Cause I'm just super paranoid cause i had unprotected sex but he pulled out and i feel that I'm fine, I'm just thinking too much. I've just had some clear discharge after it happened and the day after but today I'm fine. I was on a birth control and i finished the sugar pills and then i had to wait like 2 days without anything until my new one came in and then i started taking that immediately. Am i okay? Am i just over thinking it??