Hi. Im A 42yr Old Woman And Was Diagnosed Around

Hi. Im a 42yr old woman and was diagnosed around 6 yrs ago with psoriatic arthritis. Over the last 2 years I've had numbness in my right foot along the side of my big toe, tingling in my right hand affecting 3 fingers from my little finger and now around my bottom lip? Can this be related to the arthritis? I had an MRI which showed no signs of ms but I'm terrified they've missed something?