I had unprotected sex September 12th and he nutted in me. 2 weeks later I started my period. Since my period ended I’ve been having the same back pain,cramping, nausea,for the past 3 weeks. We had sex again on the 7th and the 11th of October he nutted in me on the 7th and twice the 11th and I ovulated on the 7th.. i had my period last month and I was feeling this way a day after it ended.. I do have irregular periods tho so should I just wait until the 31st to take a test?? Or could I be pregnant ??