I have suffer through two boughts of PF. First time I didn’t realize what I had for a couple months and I made it worse by just trying to tough it out while carrying heavy loads in my pack on crappy hiking boots.
. For me…it took 6 months for the sharp pain in the heel l to go away enough that I didn’t have to crawl to the restroom at it when I woke up at 2:00 AM.
What I have learned is you need to be in good supporting shoes at all times when on your feet during the recovery months. Stretch and roll the foot with a ball often, even when you don’t think you need to. Eventually it slowly starts to fade away until, You wake up and day and forget you had it.
Like Mike said, a professional can probably help a lot…and maybe cut a few months off the recovery.
Best of luck, and sorry to hear that you have it. It is not a quick fix.