Help help someone help me so I can be in peace.

On June 25th I remove my nexplanon. And got on the birth control pills. I was on birth control for 5 day we had unprotected sex he came in side of me he never does but that time he did. that’s the first time he did That i was so scared so in morning i took

Two pills of birth control . Then we have unprotected se the 9th and 14. But he pull out those 2 time . That day 14 I take my birth control then that next day I decided them to stop taking them because I get stomach each and headache when I take them . So right know am worry if I could end up pregnant .. i been having abdominal cramp idk if is my period or something else . When I was on the nexplanon I didn have my period for 2 year.