earliest symptoms.?! feeling weird

I know these may seem crazy but I've been kind of scared after I had u protected sex usually we do PO. However AF is due the 15. Last few days I've had diarrhea, cramping in lower abdominal, excessive discharge, dull pain in ovaries, veiny large breast, and I feel so moody. I've snapped on a few people which is not like me. I don't feel myself or maybe I'm paranoid? Is it to early to have symptoms and has anyone else had these?