Oh my goodness! What a roller coaster, scjp. I have had an evap on a FRER but it was gray so it was pretty easy to tell. I think a test now would be dark if that had been a positive test 4 days ago. Or potentially a chem. I am sad for you... :(
Be sure to get as thoroughly checked at the dr as you are willing to go through. I do not want them to brush you off! Something is up and it's time to find out what.