If you have high testosterone in your body is it okay to get prp for you hair?

I have had prp done twice both within 7 months of each other. I had a lot of shedding the first couple months. By the 5 month my hair was thicker and had curl to it. The last treatment I had after about 8 months my hair went from thick to thin again? How often should I have it done and is having high testosterone bad when injecting the blood into the scalp?