I was on vaginal metronidazole from 16-21 my cycle was 21-25 had intercourse on the 30 now my breast are sore and i spot when i wipe. what could it be?

Pregnancy: if you had intercourse then the possibility of pregnancy is always present I would suggest you don't home pregnancy test

Concern for preg?: Often times, a period is delayed and women are concerned about being pregnant. With a history of unprotected intercourse, the anxiety due to a possible unplanned pregnancy rises. A easy way to determine if you are pregnant is by doing a home pregnancy test. It can be done around the time of your expected period. It can be done safely and with ease within the comfort/privacy of your home.