It does indeed sound like carpal tunnel tunnel syndrome, which you can google. I would also suggest posting your problem at medhelp's carpal tunnel discussion forum:
http://www.medhelp.org/forums/Carpal-Tunnel-Syndrome/show/1216
If Carpal Tunnel is not treated--and early--people can very well find themselves unable to work at all, because it only gets worse if left untended.
Are you absolutely certain you cannot afford medical care? Here are some things to think about:
Since you are under 26 years old, I believe you can still be on your parents' health care plan, if they have one.
Are you eligible for Medicaid?
Have you thoroughly checked out the Affordable Care Act (ObamaCare)? This is one situation where you do want to talk with someone who actually handles the program, rather than relying on word of mouth from acquaintances. If you google something like 'healthcare.gov', you will find an online form to fill out to see what you're eligible for and what it would cost.
Until you get some kind of health care coverage, you will have to pay out of pocket. I know that's scary, but it's going to be necessary for you to see someone about this if you want to continue working with your hands. I'd suggest calling a doctor or seeing if there is a neighborhood clinic somewhere near you.
It's not much talked about, but doctors and pharmacies often have 'sliding scales' or payment plans to help those who are poor.
You don't have anything to lose by picking up the phone and making a few calls to local health care offices.