Looks like you're progressing, albeit slowly. Have you considered derma rolling?
At least you still have a good base for Toppik to grab onto.
I've had blood tests done about two years ago - they all came out normal. Never asked for a thyroid test, but here in Sweden they're hesitant to do anything unless it may be really serious. My doctor prescribed me finasteride when I showed her my pics when I was a kid and how it is today. She said that I'm most probably one of the few extremely unlucky who get male pattern baldness as a kid/teen and that balding doesn't have to follow the same pattern in the family.
I've read that stress can trigger early male pattern baldness, and that's probably the cause. Especially since I recently was diagnosed with gastritis too which I had for about the same time as when my hairloss started, and that is usually caused by stress. I've always tought my gastritis was back pain, since that's where it mainly hurt, but my doctor knew that it was gastritis since strong back pain is a common symptom paired with a hurting tummy. Currently eating some presciption drug which is helping alot.
But how important is the thyroid really for the hair? Perhaps I'll go for it.