On the verge of a nervous break down

Belle

Okay ladies, I seriously need some help and advice. All month I’ve been extremely stressed and it absolutely hasn’t stopped. I missed my period. I was stressed I was pregnant. So I took a pregnancy test before I missed my period and it came out negative. I took one about two weeks after I missed it. It came out negative. I still have no period but I’m PMSing like a SOB. Am I crazy? Could I still be pregnant???