Period or pull or pregnancy

Meg • I'm Megan! I am a dancer if 10 years. Very good with people and advice.

Been on birth control for 3 months, missed 2 pills out of my pack this month. Have 6 days until period is supposed to start. Boyfriend and I don’t use protection, but he doesn’t finish inside of me. Been having spotting and cramping and nipple sensitivity. Is it period? pregnancy?