Birth Control and Pregnancy: Understanding Back-up Protection & Missed Pills

Question
hi yes sorry to bugg u but ive been having this question for the longest time and nobody can seem to give me the answer i really need to know.
i was wondering can BC backtrack on you? like if u had sex w/o protection.. and then you didnt take some pills can you get pregant? bcz ive been feeling like i have morning sickness for about 2 wks now but ive have  my periods but this time it was 10 days earlier and ive been feeling weird. please write me back asap.
i apreciate it.
thanks
anglia renee'

Answer
This pill is not 100% effective. If you are missing pills then you are at a HIGH risk for pregnancy - similar to if you weren't taking the pill at all. I suggest talking with your doctor to learn more about how you should be taking the pill. From your note, it doesn't sound as if you understand how it works.