It has taken me some time to connect with someone who has PsA and SFN, but so glad to "meet" you...
It took years to get the PsA diagnosis as my psoriasis is so mild. I saw many, many doctors who could not give me a diagnosis. Although I worried that I was imagining my illness, the doctors assured me that my symptoms were real. Three years after I started seeing an orthopedic surgeon, I was diagnosed with psoriasis by my dermatologist and the orthopedic hand surgeon had me see a rheumatologist. Since 2004, I have been on MTX with very good results. Ten years later, I was diagnosed with SFN by a neurologist and 8 years later, that is my biggest problem. I could not stomach the meds that were subscribed, but now I am on a light dose of Nortriptyline, which helps a little. For about 6 years, I also have had acupuncture with herbal medicine, which has helped at times when Western medicine such as gastrointologists could not help me. I also see other doctors for symptoms related to my diagnosis, including an optometrist who diagnosed eye surface inflammation, which is very painful but relieved almost immediately with ophthalmic suspension eyedrops.
As you can imagine, I could go on and on with this, but will end here just in case there is no response.