Help!?

KK • country by heart💞

My nipples are super sore(not my whole breast, just my nipples) and me and my boyfriend have sex quite a lot but the last 2 days afterwards i’ve had super bad pain. Yesterday it was to the point where I couldn’t even move. my period was due today and it’s usually spot on with the app but it hasn’t come, even though it’s literally only been a day so i’m not going to think much about it. what could be wrong??