You said your appt is Tuesday. What if you call tomorrow and reschedule that appt for next week instead? Give the OTC arch supports a chance to do their magic? Maybe you'll go to 99% relief! (but 80% is fabulous as it is!)
If the OTC insoles solve your problem, that would save you the $$ of going to the podiatrist. And if they don't after a good week, then you'll have more info for the podiatrist to work with. ("at two days they felt like this, at 5 days they felt like this, and this is still sore, and that hurts at the end of the day" all valuable info!)
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson