....and now I'm off the bus, I'll reply more fully.
Because PsA is a systemic autoimmune condition, I think it is wise to seriously consider going onto regular medication before you experience some of the more unpleasant symptoms - steroids are great for a short period of time, but are more of a sticking plaster to get you through a flare or whilst something else begins to take effect & they have risks of their own; basically, you've chucked a fire blanket over a blazing fire, but you haven't actually put out the smouldering remains, which is where you get additional issues like joint involvement, spinal issues or other more unpleasant things in the longterm, such as a higher risk of (and it's a risk, not guaranteed)
Some cancers
High Cholesterol
Cardiovascular events including heart attack, cardiomyopathy and strokes
Tendon rupture
Plantar fasciiosis (worse than fasciitis)
Joint deformities
Spinal involvement
Being unable to walk because every joint in your foot is affected
A full body Psoriasis flare in every nook and cranny
Hearing loss
Massive immune system overreactions to infection
I did the MTX path and eventually went onto biologics, first Humira, then Cosentyx with the occasional steroid shot. Cosentyx is brilliant for me, I'm almost pain free almost all of the time, I'm not constantly injuring myself, I'm far less tired (no waking up feeling as if I've been round a giant cement mixer filled with broken lumps of concrete) and I am as emotionally stable as is possible - my main/primary sign of a flare is the inflammation completely buggering up my mood.
But most people can't go onto biologics unless they can't have their disease controlled by MTX alone. I see it as something that has to be tried (preferably by injection, as it is far easier and has lower side effects than oral) before being able to access things that are designed to work specifically on the particular part of the immune system that is buggering things up, rather than the blunt weapon that is MTX.
And it's nice having reasonable nails and skin, too, instead of feeling rather motheaten (the full scalp flare and hair loss/burning was not when I felt at my pretties) and also never knowing silence again due to tinnitus/hearing loss.
It's a pain in the arse (and everywhere else at times), but it's not like I can change my stupid immune system - it's clearly as easily bored as the rest of me and just as capable of dropping me in the shit as my hyperactive brain - but it's not my entire existence, it's just part of what makes me Me, just as liking Godzilla movies and playing bass when not twatting around on the internet or spoiling the cats is.
If I were you, I'd think about it a bit more and maybe try to get back to the Rheumatologist sooner rather than later. The first day you wake up and you don't actually have anything hurting, sore, flaking, peeling or just not feeling right is weird, but a pretty bloody amazing weird.