Hello, I'm a 14yrld Girl at 52kg and 171cm tall

I have a concern in which I haven't had my period for 5months now. I have recently reached my goal weight from losing 13kgs (woohoo) which I lost within those 5-ish months but in that time of changing my eating lifestyle (which I did the healthy safe way) I haven't had my period and that worried me. So judging by that observation, I'm guessing it's to do with my weightloss but perhaps not? As strange as it may sound, I just want my period back :L It's concerning not having it so yeah

I'd appreciate your help and advice

thankyou