Plan b help

I just took plan b for the first time 2 days ago. Me and my boyfriend had unprotected sex multiple times and decided to just buy plan b right afterwards. He pulled out every time too. The thing is that I’m experiencing awful cramps, worse than ever before- so bad I have to stop what I’m doing and hold myself or sit down. I feel sick and dizzy.

My period is not coming- it’s super late, but I have all the side effects of having my period still. Tender breast, cramping, bloating, acne etc. I’m a little sketched out and a bit worried. Is any of this normal? Or could I be pregnant? Should I be worried?