Birth control - how long

I just stopped taking my birth control at the end of the pill pack which was 9/9/15, I have been feeling weird. My fiancé and I are TTC. I dont know if AF is going to be regular.... I was wondering if anyone felt weird or different they got off the pill... i feel sick, nauseous, tired, my head always hurts, my chest almost hurts. How long did it take others TTC when they got off of the pill.... I am nervous in a way because my fiance has an 8 month old from a previous relationship... he has been my best friend for 10 years and I knew I was going to marry him since the day I met him my freshman year of high school! If anyone could please help!