In Oct. I recieved my period twice at the beginning of the month and at the end leading into the next month(Nov). About a week ago I was in the hosptal for a blood clot and I stayed 6days. I stopped taking tri-nessa about a month ago before that and I restarted taking tri-nessa the Sunday after I got out of the hospital the following Monday and I still have no period and the month is now gone. Should I be worried?