She doesn't believe in self testing?! I think it's time to get a second opinion, preferably from an endocrinologist who specializes in diabetes. Enough with the nurse. In my opinion, she's going to kill you or substantially shorten your life.
You said your blood glucose was 7.5 up to 14.5? What kind of meter are you using? Are you sure it's not an A1C tester? Regular blood glucose testers give you results in whole numbers. High two digits or low three digits is normal (like 80 to 120 or so). Since you are sweating when you eat, it sounds like your blood glucose could be going really high. This could be because of what you are eating (too many carbs and/or too many of the wrong carbs--ie. sugar, white bread, potatoes) or it could be that you need insulin.
The pain in your feet could get better if your diabetes were better managed DAY TO DAY. The cloudy urine is also a symptom of poorly managed diabetes.
You need a DOCTOR who knows how to manage diabetes and can educate you on how to manage yours day to day, with diet, exercise, and medication. With proper education on how to test, when to test, what to eat, how to count carbs, you can turn this around. If you haven't seen a nutritionist, you should, they are so so helpful with managing your diet.
You should also have a diabetic eye exam ASAP because of this blurred vision. I wouldn't wait on that either.
I really hope this helps you and that you get the help you need. If I were you, I would also consider writing a letter to whatever doctor manages this nurse practitioner you've been seeing and tell him or her what has been going on and how poorly you've been managed. I would also never darken that office door again, if I were you.
Best of luck.