Can i get pregnant if had sex 3 days before ovulation?

Very good chance: You can actually get pregnant during any time of your cycle, but the chance is highest during/around time of ovulation (which, unfortunate, is very difficult to tell exactly when). The chance becomes less and less as you get older. In your case, knowing when you are ovulating and having relation before/during this process will increase your chance, with fertile sperm of course. Good luck.