Hairloss and acne increasing over 4 year period?? 24 year old

Hi, I am a 24 year old male, I eat very healthy and exercise. Over the past 3-4 years my hair has become increasingly less and less, but just on the front section of my head, not the back area. During this time, my acne has also increased gradually and continues to develop. During high school I had no acne at all, and throughout first year in college I had zero acne and hairless. But shorty afterwards, hairless and acne very slowly increased and has been over the years. Can someone please help me understand the problem? I think its from to much DHT production, but hasn't it been the same over highschool, or shouldn't it have been worse then. Also, last year when my blood work came in, my vitamin D was very low, at a 15. So I was given very strong doses for a month and then started to take 2000ui everyday, during this time my acne virtually stopped, but it was over the summer and I was getting slot of sun also. But then I stopped and acne returned again. So is the the reason for my acne and hairloss? If I increase these levels will my hair regrow and thicken along with clearer skin? Thank you for any help