Could you be pregnant if you missed the pill for four days and on the fourth day you took all 4 pills and had sex a few hours later?

First off, it is a very bad idea to take 4 pills at once. If you miss 4 days, do not make up for it by taking 4 pills. You are already messing with your hormones by taking birth control, read the instructions. It should tell you that if you miss a dose, just continue taking 1 at a time....never more! Second, you can get pregnant. Your body needs to run a full cycle (or at least 2 weeks) on birth control before you are protected. Missing 4 days and then overdosing, doesn't protect you at all because it hasn't had a chance to take effect. Be more responsible with drugs and consider having a condom on hand just in case you miss another dose.