Any one know anything?

Slight TMI ahead!!!!!

I’m 14 days late on my period, tested 4 days after my missed period, then again 9 days after. Both BFN. I had cramps, sore breasts and a few other things. Well today I had really smelly gas and diarrhea. Slight nausea but didn’t fully feel like I had to throw up. I could be pregnant but those two BFN threw me off. Any suggestions on what it is?