Frustrated - anyone have anything similar?

So I posted earlier in the week saying I had symptoms asking if my test had a faint line. Every test I’d taken after that has been a bfn so I chalked it up to an evaporation line and figured I’d just relax and wait to see if my AF comes. I’ve been super nauseas all week to the point of vomiting yesterday. Some other symptoms as well. I’m now 15dpo, my AF never showed yesterday and no sight of it today. I’m usually right on target with dates when tracking my AF. I tested this morning and still negative…. What’s going on? … Very frustrated.