My daughter in law found out she was 6 months pregnant in November, she had been on the pill, so it came as a big surprise to her, and everyone else! When she went for her check up she was told everything was fine, she was very concerned about being on the pill all that time. The baby was due on Valentines Day, so we started to get things sorted for the baby almost straight away, good job really as the baby decided to come early, and arrived on Christmas Eve. They have called her Holly, she is our first grandchild, perfect and absolutely gorgeous. So the answer to your question is yes it is definitely possible. If you think you could be pregnant then do a test. It will put your mind at rest and you will then be in a position to make informed decisions on what to do next. Good Luck