I think there are a couple factors that will determine how well/soon PRP will work.
Did you use your own blood? If so, how old are you? The older we get, the less effective the treatment may be.
If you used a “donor” product, difficult to truly determine chain of command for correct storage, and how good the product is.
I had it done on an area in my spine, and had good results ( I was about 67 at that time) but it took a long time for relief, as they are injecting cells that have been sorted to obtain certain ones, and then placing them near the cells they wish to duplicate. New cells have to grow. Sort of one day I realized that the treated area wasn’t such a problem.
I hope your doctor explained the process and possible time frame before your treatment…if not, he is certainly the one to check with. Seems like he did explain that you may need several treatments in the same area to get your desired results…
Good luck!