Cramps and nausea - period not for 2 wks

So my period isn’t supposed to happen for another two weeks. I’ve been cramping like I’ve been on my period and I’ve woken up with nausea and had nausea on and off for about a week and a half and my period isn’t due for another two weeks.

Has this happened to anyone else? What happened? It’s just weird. My boyfriend and I had sex while it first started happening and we had to stop because I was cramping so bad. And now it hasn’t stopped. It feels just like my period but obviously isn’t. It’s such a low chance that I’m pregnant but idk what else it could be. It’s just weird lol