I agree with CurfewX. Perhaps you have a diabetic friend with equipment to test your sugar. Then you will know or at least have a reasonable idea.
Check your blood when you have the shaking phenomenon, and first thing in the morning before coffee, juice, etc. That will save you a few bucks.
A quickie clinic visit would also be a good idea.
Please do not attempt to treat your symptoms at home. Since you have no diagnosis, whatever you try could make the situation worse, or create an emergency event. You need to see a doctor ASAP for testing. It is possible you just have a blood sugar issue, or are dehydrated, but it is also possible that you are diabetic. Your symptoms warrant a visit to urgent care, if you can't get in to see your regular doctor quickly.