I'm 16 yrs old, been a vegetarian for a year and half i believe i don't get a lot of protein through out my day and since January I've been missing my periods and i definitely knew i couldn't be pregnant, until April I've gotten about 3 periods. In May i had protected sex and i took plan b later that day, a week i got my period after that haven't got it, in July me and my boyfriend had protected sex again and took plan b again but haven't got my period since, its been 2 months. I know i'm not pregnant. Also ive had a bunch of things on my mind this year so it could be from stress. I just want to know what else could be wrong with my body??