I am day 36 of my cycle, 5 days pass when my predicted period should of happened, and with 2 negative pregnancy tests. My cycles are usually 26-28 days longer but 27 is my norm. Last month my period came on day 30. I haven't been more stressed than usual (at 27 years old decided to go back to college and I am taking 16hours) so I don't think that's playing a part in this. I rarely get periods that last this long. This month I had 7 high ovulation tests with no peak. I am worried maybe I didn't ovulate or something is wrong with me. Should I call my doctor or wait longer?