Left palm burning ?

So for a few weeks now my left hand has been burning from my middle finger to the end of my pinky. It's only my left hand and running cool water doesn't help but only makes it worse. I am on the computer a lot but I use my right hand way more since I am right handed. Could this be a nerve damage, MS(runs in my family, I'm only 20 yrs old) or carpal tunnel(which you'd think would be in both hands). I can't afford to see a doctor about this right now, I only just started my job and I won't have insurance until next year, so please give me the best possible reason for this to be happening. Im worried that it's going to cause problems while I'm working.