This is my second month on birth control. I never got a period from my first month. My husband and I have had unprotected sex during ovulation. I've only missed one pill and not during a sex episode. I have been sick off and on with a sinus infection. But I'm also having cramping and a little spotting. I read that if you are dehydrated or on antibiotics your pill might not work. I have only taken antihistamines. But I have a lot of symptoms. Has any one heard of getting pregnant like this?