Is PRP treatment advisable for thinning of hair due to vitamin B12 deficiency?

Hi doctor,

I am a 22-year-old female and a working professional. I mostly work in night shifts and graveyard shifts (1 am - 12 pm). I have had thick hair in the past but since the past four years, my hair kept thinning and I now see little signs of baldness on the crown of my head. I have recently visited one of the doctor and she suggested few tests such as thyroid, HIV, hepatitis, etc. Everything seemed normal but she noticed that I had vitamin B12 deficiency and recommended PRP treatment for my hair where she would inject my own blood into the pores of my skull (crown) for about six months, so it would be six sessions and she said that would help. I am really scared to get that done as I want to know if there would be any complications or side effects in future after going for PRP, I also have to accept that my hair has thinned out drastically and I want to do anything that would definitely help me.