Am I Just Paranoid?

So I got my period on January 29th, and it lasted 5 days. On the 11th of February, I had a heavy make out session with my boyfriend. I had underwear on, and he had underwear and basket ball shorts on. We didn't hump or anything like that. I don't know if he ejaculated or not (although I'm pretty sure he didn't). 4 days later, on the 15th, I got my period, which was heavy and lasted 5 days. I've been feeling strange ever since the 12th though, and my period coming on the 15th is super early. I went to the doctor on 24th of February and they did a routine pregnancy test since I was complaining of abdominal and back pain, which came back negative. Out of paranoia, I took a home pregnancy test on the 4th, which was negative. The next day, March 5th, I got my second period since the 11th, and it was heavy and lasted 5 days. I'm still feeling weird though. Am I just paranoid?