Dupa vs MPB with retrograde vs thyroid related loss? (Photo)

Few months ago noticed hair thinning (3 months prior was very stressed) I’ve been Norwood 2 for 8 years but never noticed thinning before. Thinning is diffuse worse on my front side and side burns where it looks the most thin. Back also thinning/shedding a bit but not near the extent of top or sides. Lateral half of eyebrows are also thinner. I’m on synthyroid and ft4 was at 2.07 with upper limit of normal at 1.7. Hoping to get some insight into what you guys think my hair loss process is.