You can post on multiple forums - no problem there.
I've had anxiety like that and sent many a long fretful day poking at myself, convinced I felt some lump or bump or tender spot that didn't belong. It's miserable, isn't it? I agree that staying busy is a good way to change focus and it will likely have the bonus effect of distracting you from cravings.
Anxiety is a very real symptom of withdrawal, I hope knowing that is helpful. Good thing you're going to see your doctor. Will you be able to be honest about all rats going on with you?
O