Could I be pregnant help!!!

I had unprotected sex three weeks ago on the 8,9,10 and 15 (all multiple sessions) but since about last week I’ve been very bloated and have been having weird cramping like stinging, stomach hurts, nausea also, but I think I must have gotten my period but I’m not sure. I was feeling like this way before I got my period (or what it is thought to be). I get really sharp pains on either sides of my stomach area and only, I guess, cramp on one side of my Fallopian tubes.

Should I be worried and take a test on the 8th of next month just to be safe?

I’ve gotten use to knowing my body and something is just off. I know it.