If you're uninsured, try one of those private-run clinics that offer services for free so you don't get stuck with an ER bill and they'll usually help you get long-term care if you do end up needing it. Usually, all you need is an ID saying you live in the area the clinic covers.
Your complaint brings new meaning to the term "weak in the knees".
Seriously though, you should get this checked out by a doctor, and soon!
Preferably before you wake up one morning and discover yourself trapped in your own bed - or your own body (like Locked-in Syndrome).
Wikipedia - Locked-in Syndrome - [link] - Locked-in syndrome is a condition in which a patient is aware and awake but cannot move or communicate verbally due to complete paralysis of nearly all voluntary muscles in the body except for the eyes. Total locked-in syndrome is a version of locked-in syndrome where the eyes are paralyzed, as well.