I'm confused

Demeri

guys I'm running on a 66 day cycle and I'm confused as to why I've had no peirod, I've already been to the doctor a few weeks ago.to see if I was pregnant and got nothing but negative results. but the last 3 days I have been sick to my stomach an I also have a women health check up today to make sure all is right with my lady parts. what are your opinions, I'm at a total lose