Pain is no joke and I wish you all the best!
Exercise is important - just find something you enjoy and work to get a little better bit by bit. Walk the dog, dance, yoga, kickboxing, cycling, and the list goes on. Exercise is important as it helps to build muscle and deal with stress. My advice is to do something you enjoy and just focus on being steady/consistent. Then, improve in small bits, like 3 or 5 extra minutes.
I loved the recommendation for physical therapy. If that is an option, go for it. I had one show me how to tape my feet for plantar problems and it made a significant difference.