🙄. Missing period?

Sophie

I'm 17 and for the past two pretty much three months I've skipped my period. I normally have heavy and short periods, but they stopped and then maybe a week ago I got blood midday for a few days but at no other time? Just at midday. And then it was gone. I'm not sexually active. I am iron deficient, but on tablets for it, I've been iron deficient for a long time and never had this problem. What?? 🙄 annoying