2 years on fin. Hair thinning, high serum dht.

I feel like my hair started to get thinner in Sep. Dec and Jan even more. Got my bloodwork done and there are two things. D3 deficency, but got meds for that, and more concerning high dht. 477pg/ml after 2 years on fin. No idea what my baseline was tho. I fear that It either jumped or was that high for the whole time, and fin isn't cutting it anymore. Advice?