I am on birth control and take it as scheduled. I had sex without a condom around the first of the year, partner pulled out. Two weeks later I had a period. The last few days I have had sore breasts and they seem fuller. Some lower back pain. Today is day 16 of my cycle so right around ovulation. Wondering if this breast pain in early pregnancy signs, ovulation, or something else. I typically do not have this issue.