Boy, you sure have been through a lot, I'm so sorry you're going through so much. Are you on current med's for your diabetes or anything else? It doesn't sound like you're doc's are taking your symp's seriously enough. Could you also have Fibromyalgia or CFIDS/CFS? have you had your Thyroid and liver checked recently? Also depression, as mentioned, can really wreak havoc on us, especially if we're all ready dealing with other illnesses. And who wouldn't be depressed when feeling so badly. Glad you're here and posting though, you'll find the answers eventually, and you may want to check out the Marshall Protocol: marshallprotocol.com, its a treatment that many people who deal with many of the same symptoms and illnesses that you listed, and they're (we're) feeling better and even making full recoveries. Keep us updated on how you're doing!
i am sorry about your health problems. it must be very taxing physically and mentally. do you have support from nearby friends or neighbors? it sounds like you probably see your health professional(s) on a regular basis, so i hope you bring up the problem of your level of exhaustion. could it be bordering on depression? that in itself could cause the drop in energy you're experiencing. good luck and try not to loose faith :)