help!!! I'm so UNCOMFORTABLE

I need some help. I've been extremely uncomfortable for a week now. Nauseous for a few days. And now I'm irritable. My BF and I had unprotected sex 6 weeks ago and he came in me that entire week. I was on BCP but missed a few days from that pack. I have irregular periods as it is but have been regular since I was put on the pill. I have not gotten my period yet. I took 2 pregnancy tests and both came back negative. I dk if it's me being paranoid or if I really am pregnant. But I'm not sure bc I have PCOS and have tried to conceive in the past on meds and failed. Has Anyone else had this happen to them? Please help bc I dk what else to do and don't want to buy more pregnancy tests and have them say negative like always.