Adam,
Firstly, I am sorry that you are feeling so low and I do hope you feel better soon.! I am sending you "positive energy!"
1) Do you still suffer from plantar fasciitis ? Is it worst first thing in the morning, as you put your weight on your feet ? If the answer is yes, I would suggest a pain of orthotic flip flops, that will stop your feet from over-pronating and let the healing of the plantar fascia to continue. You see the body is great at repairing itself, and during the time when you are asleep or resting the plantar fascia begins to heal, but then the moment you put your feet down, baaamm it tears again, and this now becomes something that you have learnt to live with..get a pair of sandals or flip flops that will stop this from happening. You may want to try comfort flip flops | flopeds | orthotic support ( or a similar type product)
2) Once you get relief from these ( or a similar type product), you should consider an orthotic for you to continue to provide your feet with the support. Depending on how much you feet are over pronating, there will be a fair amount of internal tibial rotation, which in-turn can cause the hips to tilt forward and then the back muscles will try and correct the tilt and this causes the entire body to be thrown out of alignment. But in its simple terms the feet are still the foundation of the body and any mis-alignment can transfer higher up the body.
3) I would also suggest you stay away from any high impact activity - walking / swimming is fine..just listen to your body.
Let me know how it goes.
Douglas