So I had unprotected sex Saturday night October 3rd and I took the plan b one step pill Sunday oct 4th in the morning I was not on birth control, my stomach started hurting Monday and ever since I took the pill I've been having yellow spotting but that's it and I was supposed to start my period Oct 5th and it still Hasn't started... I haven't had any pregnancy symptoms and I'm really afraid that I may be pregnant should I be worried?! I really need som advice on what to do!!