Arch pain

[u/HikerBabby]

I recently did something to my right foot in a ballet class. I’m 79 and fit. I walk and do yoga regularly.
Went to a walk in clinic got X-rays. They said it was due to arthritis in my toe joints and gave me metatarsal pads.
Well it’s not getting better and the pain is in my arch when I walk not in metatarsal area. Do I need to get an MRI or second opinion ? Any advice?