Sore nipples? Birth control?

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So I had sex with a condom in the last week a few times and my nipples are kind of sore today. I am also on the pill for the last month and a half. I haven't missed any pills and I take them at the exact time. I checked the condom after each use and none of them broke. Why are my nipples sore? Is it the pill or was my bf maybe too rough? 😭

Also, I should start my period in 8 days...