My feet were swollen to the extent I couldn't wear shoes sometimes and tingly/numb/burning all at the same time for a year or two, until my diagnosis. Upon getting my blood glucose down shortly after dx my shoes suddenly felt a couple sizes too big and the burning and numbness became a memory.
Some people have stomach issues with Metformin solved by having the extended release ER formulation prescribed.
I used diet and exercise to get my bgs down. They cost effectively nothing because I have to eat anyway.
In my opinion if you put all this off until you do see a visible ulcer or something it's going to be far too late. The good news is something has finally gotten your attention. The question is what you'll do from here. You've spent far too long being afraid. Being proactive gives you some control back in your life, lets you be rewarded for doing positive things, and is a lot less scary. The only thing you have to lose is fear. Good luck!