Paranoia and pregnancy possibility

Okay so, I was in a relationship with a woman for nearly 6 years and hadn’t been with a man in 8 years. Trying to heal from this break up, and possibly trying to fill a void, I slept with a guy friend and we were caught up, we completely slipped up, no protection, no pull out method, nothing.

My body had been pretty regular with a 24-27 day cycle for years but the cycle before was way early and I ovulated earlier than usual (I can feel a faint cramp when this is happening), so I felt that my cycle was off this month. However, we had sex 3 days before my scheduled period and now I’m a Lil paranoid only because my usually 5-6 day cycle was barely even 3 days.

Should I be as paranoid? I’m not experiencing any symptoms. I’ve had children but they’re teens now and my memory could be a little off since back then lol.