Am I pregnant or ?

Soo I haven't had my period for a month now. Hubby & I BD a few times (some unprotected and some protected, also been forgetting to take Birth control) towards the end of last month I was stressed but not too bad and right now everything is okay. Lately I've been having nausea, tons of pain with my breasts, dizziness, random acne popped up all over my face. I thought I had my period but only lasted for a few mins then it's gone. Idk what to do. Should I test or it just stress that causing it