Am I pregnant?

Hello ladies.

Just to make the point, I am taking birth control and regularly take it. My boyfriend and I did have some forms of unprotected sex, around 2 times, but he didn’t finish in me nor did we continue without putting a condom on. I was suppose to have my period two days ago but have been having cramping and constant brown discharge to the point i do have to use a pad. But I haven’t gotten my period. Is there a possibility I’m pregnant?

Edit:

I forgot to mention I am still passing tissue. I’m just freaked cause my period has not been late for the past 3 months and I’m I’ve been pretty accurate with birth control this month.