Pill help

Normally I chart my period but for some reason I’m February I forgot to mark when my period began and ended. I know in January my period began the 25th and ended the 29th and I know 100% sure that I did have a period in February around the same time. I am just not sure the specific day. My main issue is, I just finished my last inactive pill for March on Saturday (March 24) and never started a period in March. Two weeks ago (March 13) I missed a pill and then took two pills the next night, but right before i took the two pills, my boyfriend and i had sex and he came in me. I am now on the third day of a new pack of active pills and i have cramps/pains that feel like period pains but no bleeding. I have taken a pregnancy test and it came out negative, but i know it could be too soon to tell. 1. Is there a chance I’m pregnant? And 2. Should i stop taking my birth control now to see if my period will start? Thanks!