My grandad (mom's dad) was diabetic for years and did have his leg amputated. But, he didn't regulate his insulin very well, didn't eat properly, also drank a wee bit too much. Had lots of insulin shock reactions during his span, but that was decades ago and so much, IS so much better now a days for diabetics. I don't have diabetes (yet), but is prevelent on both sides of my immediate family...some have had to have toes removed.
Just my opinion, but I think if I was having any type of feet problems (and diabetic)...I'd find a good podiatrist, as that is their specialty. I know some people who are diabetic...have them even trim their toenails, in a steril(sp?) environment, as a precaution. As you know....tootsies are very important to keep a good check for diabetics. :-) But any doctor should be supportive, relay advice in a calm manner, and not treat an adult patient as a child either.
Good luck and best wishes! :-)