I have never taken birth control before and began taking ortho tri cyclen on Sunday September 28. I have taken it every night at 9 pm and am on day 15. I had unprotected sex today and didnt take my pill yet because it is not 9 pm, is there any chance i could be pregnant? All of my friends said oral contraceptives take at least a month to work, but is mine working already? I really need a professional opinion as soon as possible. I have never take birth control before until these past 2 weeks so I am very nervous. Should I take Plan B? I already took it in early August so is that bad to take twice??? HELP PLEASE