Plantar fascia tear not healing?

I’m 33, mom to a toddler, overweight and semi-active. I broke my 5th metatarsal 1.5 years ago. Being in the boot during that recovery made my life plantar fasciitis worse in that one foot. I have since had 2 cortisone injections near my heel, up until my recent tear.

4 weeks ago I tripped over a parking block holding my son and had a sudden severe pain in my arch/heel. I saw my podiatrist the following day and he confirmed through ultrasound a complete tear of my plantar fascia. He told me this was a weight bearing injury and I’d be okay as long as I was in a walking boot.

Followed up with his after 3 weeks and he found I now have inflammation in some joint through my foot. He warned me this could happen. He taped my arch ad prescribed prednisone and NSAIDs. I am 100% in my boot and haven’t left my house much. I am babying this as much as I can.

My questions: why do I have so much toe pain in my 2 middle toes? Why does the pain come and go? Should I have spent more time in complete immobilization?