Hello, I have had an extreme feeling of lightheadness for about 4-5 years. I am 16 and this feeling started in 6th grade. I had scans and tests but all I have found is that I have hypothyroidism. I have been on synthroid, but nothing has seemed to help. I've found the lightheadedness gets worse when I eat pasta and breads. I tried gluten free for 9 months and no change. This lightheaded feeling has been constant and I haven't felt normal in 5 years. I hate this feeling because I don't feel like I'm experiencing anything in my life, and I am having such a hard time remembering what it felt like to be normal.if anyone has ever experienced this or knows what could be causing this, Please help me.