My 10 yr old is a woman 😱

Al

So my 10 year old started her period this is her 4th cycle. The last two cycles she has been super heavy and has been looking pale. When standing for a long period of time like grocery shopping she becomes very light headed and fatigued. I know it must be something to do with her iron. My question is should I give her an iron supplement? Take her to the doctor? She had a Dr visit right before she started her first cycle and her blood was tested she came back good for everything. Not anemic nothing out of the ordinary. Could that change now that she's on her cycle? Has anyone gone through this? Or any advice you can give us. I've always had regular cycles aside from bad cramps.