she first had minor side effects, threw up the first day. discharged alot for a week. then everything was perfectly fine, after her on the pill for over a week we had a night inwhich we got sexual twice and i finished in her. her period was suppose to be the 16th and today is the 18th, she has every normal pms sign, bloated, minor acne, headaches, discharge, but no period, should i be worried?