I've been on nevaring for 1 year and 3 months, February 23. My period was due, but it never came. I went to the doctor at 5 days past, and he said I wasn't pregnant, and put me on medroxyprogestron. Today is day 4. I've been done since Sunday and I was hurting. It felt like I was about to start, so I check myself, and a small blood clot about the size of my thumbnail came out, but no period?