Allen,
Heel spurs often develop to ease the tension on the plantar facia, which is the tendon which runs from the heel to the front of the foot.
I am not a doctor nor nurse, but I do have experience of Plantar faciitis. I woke up on the morning of. Sunday 22nd October 2001 and literally could not walk. To cut a long story short I went to my nephew's wedding in December 2001 (14 months later) in a wheelchair.
It might be a good idea to google "Plantar Faciitis"
There were times I thought I would never walk again without holding on to the wall or furniture . My first Camino was an act of Thanksgiving to God for my physical healing and all the other things I learnt whilst being disabled.
Do try to get to a really good foot specialist. I have met many people who continue to suffer because they are getting treatment that lessens symptoms but do not get to the core of the problem.
I have specially made orthotics, Night splints( Plaster casts the size of wellington boots worn in bed at night) and Physio to stretch the muscles at the back of the lower leg.
I mean to be helpful. I hope I am not depressing you Allen.
The correct treatment and you will be better.