In October I took the Take Action plan and since I've taken it I've been very paranoid about my period. I had my period August 15-19, September 12-16, October 14-18 (then I took the pill, and got my period again October 20-25), and lastly November 28-2nd of December. It's December 29th now and I haven't gotten my period. I did have sex but it was protected. Should I be worried?