PLEASE READ?? I NEED HELP?

So Im a 16 year old girl and I have anxiety. Anyways, i can be sittin normally and all of a sudden, this happens sometimes, i get like this dizzy feeling for about 5 seconds and it goes away and i get anxiety sometimes and i do have a tiny bit high thyroid and i am on medicine for that bu tanyways, i get hot flashes and stuff and idk, i just have been feeling weird and not myself these past 2 months and i talked ot my doc and she did tests and stuff and anyways she says im fine, its just my thyroid and anxiety. So i was just wondering if this is normal and if someone has experienced this and stuff?