Pscoratic arthritis??

Hi guys, so this is where I'm at, I had l4/5 spinal fussion 13 years ago which left me with an arachnoid cyst compressing my thoracic spinal cord and over the years cause cervical degeneration so have been suffering with chronic back pain for years, been on all the opioids and decided sept this year to quit the meds as I became really unwell and dangerously under weight, also earlier this year I woke up one night with pain in one hand at the end joints next to nails then the next night the other hand, the pain was awful but then they started to swell like sausages and my hands where warm all the time which there like ice normally, it then progressed to my inner toes, knees, arms basically all my joints and I had chronic pain in my spine and neck but this isn't unusual for me so didn't connect it at first, my doc sent me to rheumatology where I'm awaiting an MRI scan but have to wait at least a month as I'm going in for faucet joint injections in my lumbar spine and the cortisone will mask any readings, my brother is covered in sporiosis and my nana was crippled with RA, I'm just guessing right now but it looks like pscoratic arthritis could be a possibility unless there is something else it could be, any advice would be helpful right now, thanks in advance