pain in my right arm and leg ongoing

Hi there

I have been getting pain in my right arm and leg which has been ongoing since 2004! The pain actually started in my right breast then moved on to my arm. At first this felt like a nerve pain however in recent months it has become an ache in my arm. I had a brain scan in 2004 and this showed minor changes, I was referred to a neurologist at this time who after a physical examination could find nothing wrong. This pain has come and went for the last 7 years however has got really bad this year. I was again referred to a neurologist whom I seen today however again a physical examination showed nothing. This is good news as I was worried in case I had some neurological condition however the doctor basically said I would just need to live with the pain and there was no point of doing any scans as he thought they would be clear. I got the impression he thought it was in my head and it certainly isnt the pain is very real! I feel totally fed up now because I am just going to have to live with this. I have also been feeling sick and dizzy in the last couple of months.

Does anyone have any idea what this could be?