You could be prego! I know that even if you are on bc and you miss a couple of pills you can get pregnant. My girlfriend has told me many times that her ob told her that you are super fertile after getting off bc b/c your body goes into overdrive to drop an egg

BUT everyone is different. I do know that just b/c you had trouble getting pregnant the first time does not mean you will have trouble the second time.
I would take a test.. if you are feeling the symptoms that strongly then its not too early to test. Let us know!!!