I can almost guarantee that my vitamin D iron ferritin and others are most likely very low like my lifestyle eating and everything else are so bad that I’m most likely very deficient wouldn’t be a shock honestly
you seem to have AGA albeit a bit different (with sides impacted) and manifesting with diffusing on top, but consult a derm for final verdict. Vitamin D is an inhibitor of DHT from what I had heard but am not sure, if vitamin D induced hair loss is what you have and it manifests in norwood-like pattern then those hairs will NOT come back even if vit d is fixed, the damage is permanent without regrowth medications like minoxidil.
Going to my gp tmrw to get bloodwork and hopefully a derm referal but i have seen in some post that very low iron ferritin and vit d can cause hairloss no idea how true that can be but yeah thank you for all the help much appreciated 
Went to my general practitioner got me blood test ordered which will definitely show low iron ferritin and vit d also said since I’m thinning at temples and crown most likely will go bald showing the Norwood scale obviously he doesn’t specialise in hair but that’s what he said to me
