I need help!!

So I've been on the pill for about a month, about a month I stopped taking the pill and the boyfriend and I had unprotected sex the last day i stopped bleeding from what's called the withdrawal bleeding cuz I stopped taking the pills, about a wk ago, I started bleeding again but Iv been having really strong pulling in my pelvic area. This has never happened to me during my period, I'm super nauseous and slpy, can it be possible that I'm pregnant??