You are most likely to get pregnant when you are ovulating. There are several ways to determine if you are ovulating. First keep track of your cycle you will ovulate 10-14 days before your period. When you are ovulating you will notice that the mucus in your vagina will become thicker, clearer and stronger. You can also track your basal body temperature. You can also try an ovulation predictor if you need help determining when you will ovulate.