I'm very confused, I'm not pregnant. That I know of, I'm currently on my period. Started Wednesday. But every month my period is different. At the end of 2014 I got on the depo shot, I only had gotten the shot once, bc the side affects were terrible. Now my period is very irregular. Never the same time. How would I know if I were? Or if I was ovulating. ??? I'm 19! I am just trying to learn all these things. Getting to know my body.