Welcome to the forum and reading through other posts I can definitely relate to them.
Like others have already said, stories about quick and complete recovery are often doubtful especially if they don’t back them up with bullet proof evidence and enough history/background. I, for one, have been living with PFS for years and it had wasted precious years of my life! Unlike many others, I’m a risk taker naturally so I didn’t leave any rocks unturned and there are definitely ups and downs. The downs were sometimes unbearable!
Anyway, I’d say that global approach is the best. Meaning you have to work with a trusty doctor(s) and get full testing including blood, hormones, gut, vitamins, minerals, diseases and any other possible test you can get. Accordingly, you can target all abnormalities and assess how you feel.
It takes a lot of patience and $$ to move forward but it surely worth it.
Good luck, you’re gonna need it!