so i was put on birth control little over a month ago and since then i haven’t been eating like i used to. i used to could eat and eat and eat but not it seems like i’m not even hungry, or that a few crackers will fill me up. i’m 5’1 and i weigh about 161 pounds and i’ve lost over 5 pounds since i’ve been on birth control and haven’t been eating the same what could this be?