Hi Wendy,
You don't mention what medication you are on, but if it is rosiglitazone or pioglitazone these can also give leg pains. You definitely need a monitor. It sounds like you don't have any idea of what your blood sugar level is, and without that information you can't keep your blood sugars within the safe zone. Ask your GP or diabetes nurse for a monitor. They are not available on prescription but the manufacturers give loads of them free to surgeries. If they can't or won't give you one then they are not particularly expensive to buy from any high street chemist. Once you have one then the test strips that they use are supposed to be available on prescription, although doctors are being advised by their PCTs to limit prescribing them to cut down costs. So you might have a fight to get them prescribed.
The urine test won't show very much at all. Urine tests are considered less reliable than blood tests, and in some cases may even prove dangerous due to their inaccuracy, and nowadays it is recommended that they be used only when it is not possible to perform blood tests.
Your cutting out potatoes is a very wise move, although probably for the wrong reasons! Potatoes are very high in carbohydrates and it is carbs that your digestive system converts into glucose and stores in your blood (what we refer to as blood sugar). The other food types that are very high in carbs are wheat products (bread, cakes, cereals), pasta and rice, and of course sugar. But whether you need to cut down on these, and by how much, depends really on what your blood sugar levels are - so you can see how important it is that you get hold of a blood test meter. Let us know how you get on when you see the nurse on Monday.