Hi, Well lets see, I missed the first two pills in my birth control pack (supposed to start thursday started instead saturday) and then had sex Saturday night with my husband. I then disgaurded the pack because I wanted to stop birth control completely. It s five days later and I m experiencing constipation and heartburn , my period is unpredictable since I stopped the BC. Is there any possible chance I could be pregnant? I want to be, but I didn t think that it would happen this fast. I ve only been on birth control for about 4 or 5 months. Thanks!