I haven’t had my period in 55days and idk what’s going on. I know I’m not pregnant cause I’ve never had sex before and I’m not going through like menopause cause I’m 18 so idk what’s happening I’m just really scared. Any thoughts?

( before anyone starts ranting about I have to go to a real doctor not here I already made an appointment with a doctor I’m just asking for any suggestions on here as an extra thing.)