Hi i am sorry to read about your illness. If you do think that you have arthritis and haven't already looked at your diet you could look into researching the type of foods that may not help someone with this condition.
The Arthritis Diet: Foods to Avoid
I suffer from foot pain from time to time and when the pain hits me i have found it effective to use ice and sometimes hot rub on the affected area. I also can take pain killers and may use a support bandage until things are better. I think a sports injury may have caused some of my problems.
Some people use aromatherapy oil for joint pain. You could either massage the oil onto the affected area or put some drops into your bath. Rosemary and Ginger are good for joint pain.