Thinning hair, loss of eyebrow (growing back but lacks in color) and have had a patch of hair loss.

I'm afraid I have a thyroid problem, all signs point to it for me, fatigue (not severe) even after 8 full hours of uninterrupted sleep. My hair might be in a rest phase now, or maybe I'm over thinking it. I haven't had an actual patch of hair go missing in over a year but, I've been taking loads of vitamins, protein, and biotin. What's wrong with me? I literally lost my right eye brow, luckily I'm a whiz with the makeup, but this is doing severe damage to the way I see myself and I just don't know what to do.