I was supposed to start my period on November 20th. I've been having light abdomen pain and lower back pain but still no period. I've taken 2 pregnancy tests and they both said negative. 5 days late for my period, on November 25th I start bleeding with normal period cramps. Could I be pregnant? I'm I having a miscarriage? I just don't understand what's going on because I am never late for my period and am unsure of what to do or expect.