Helenia is right, you need to try and see a GP or at least somebody who will be able to identify the problem, rather than using your current method of elimination!
I have similar problems to you, but I get the tingling in my legs and sometimes my fingers - my GP sent me to a specialist at the hospital and apparently I have poor circulation. I also get numbness in my arms sometimes, but I've always put this down to the same reason, and it's never been bad enough to have to see a doctor about it.
The symptoms you are experiencing can be related to a number of different problems, serious and non-serious, so it is really important that you see someone who can make a proper diagnosis.