A month ago I was put on a zpack antibiotic for a illness I had. I waited about 2 and a half weeks after finishing the pills before having sex again. I take my pill on time every single day. In addition, on one of the first few days of my pack I left my birth control in the car for a couple hours and I believe it got pretty hot in there. I checked the pills after and you could still see the numbering and no damage to them at all. I only had sex twice this month (no condom, pull out each time) and now I am SO nervous about being pregnant. I'm having stomach cramps (mostly digestive related but some feel like my ovaries). I'm just really scared the pills somehow didn't work and I've been on them for over a year. My period is due this Tuesday. Can anyone help ease my mind?