How can I fix Posterior Tibial Tendon Dysfunction?

I think I may have it, the pictures I've seen look like it. I did go to the doctor and had x-rays, I think he was just checking to see if anything was broken and I have a follow up this week and I'm going to ask him about this since I think it might be it. It is much worse on my right foot. Swelling has gone down alittle since I noticed but it's by no means better. I likely got it from wearing bad shoes and running. If you've had this what did you do it about? I've been soaking my feet in epsom salt, taking medicine for the pain and doing some calf rubs I saw online and rolling a frozen water bottle under my feet