DD started her periods 2 years ago, she's 15, they have been very heavy and painful right from the start. By September last year she just felt so awful we went to the GP, she was put on the pill as well as having an ultrasound which took forever as they couldn't really see what they wanted to properly but ended up saying it all looked fine 
Pill worked well initially with 2 months of no periods but then she started bleeding and didn't stop for 6 weeks, pill was changed to a different brand but the bleeding continued and she made the decision she didn't want to be on it anymore as although her periods are awful at least she wasn't bleeding every day.
Blood test which she had just before lockdown showed she had anemia and I got a text saying she should take iron for 3 months. These, and I know this is well known, have disagreed with her awfully she was so poorly. Spoke to my own GP today who looked at her blood results and said her haemoglobin level is fine but her iron is 12, he said the range is 35-400. He has done her a gynaecologist referral as he said they may be able to prescribe something else for her in terms of iron, does anyone have any experience of this, she feels so unwell, exhausted, dizzy, nauseous, her moods are awful and don't know if that's linked 