relax please:)
You ARE stressed out a bit over the top. You can tell it just from what you write. With this in mind doctors these days are more and more interested in pawning off patients to anti-depressents than actually looking for an issue.
Your all over the body symptoms could be a break out of contact dermatitis and stress. Try to relax a little bit. It is important to be concerned about your health due to your family history but it should not be an overwhelming fear. Stress is a huge causer of Cancer and with your family history you might want to relax much much more:)
Stress also creates major body issues like helping to up candida in your body and painful joint reactions. It sounds like you had a bad case of contact dermatitis that spread from touching your itchy feet to the rest of your body. Hands are horrible carriers of fungus. I had the same sort of thing happen to me while travelling in Asia. I had to use "dr. Scholls" foot powder on my hands for a few weeks. I wrapped it up with a dry bandage and kept the area super clean. It sucks to have an itchy rash that you feel you will never rid yourself of. It will go away just relax.
You obviously have a serious form of candida running rampant in your body. With your stress level as high as it is they are probably partying it up in there....margarita!!!! Take some hot baths to relax and start the diet and p&b shake plan immediatly!!!! It's easier than you think.
Try to go and get a bottle of applecider vinegar. The Braggs brand seems to be working well for me. See if cleaning your infected area is helped by using the braggs. Try it on an easy to reach area like your hands. If it seems to make it worse on your then stop. If in a couple of days it's better then continue and try it elsewhere.
Goodluck and relax.