I'm sorry but we cannot tell you if you are pregnant or not. If you had unprotected sex 4 days ago it is impossible for anyone to know if you are pregnant-- the entire process of conception takes almost a week to happen. What we can tell you is that if you are having unprotected sex, you do have a chance of getting pregnant. Most women do not get pregnant right away after beginning the attempt to conceive a child. This is absolutely normal so don't be surprised if it takes you a few months [or even longer] of unprotected sex before you actually find out you're pregnant.