So 12 days ago my boyfriend and I were just grinding/ dry humping. I had no underwear on and he only had his off for a minute but then put them back on. There was no cum, and he did not go inside of me. He only teased my genitals with his for a second. He and I were worried about the possibility of pregnancy. Today I’ve been having bleeding, of which I assume is the start of my period. But I am also worried it could be implantation bleeding?? I’ve been having really bad cramps today. They were very bad. And my boobs have been hurting since before the interaction with him even happened. Could someone give me advice? We are both 15 and virgins