Angel, you need to insist on two things while you're in Emergency....
1. An xray that will be evaluated by an orthopedic surgeon who can determine whether there is a problem with your implant (hopefully it could be forwarded to your new surgeon there in Huntsville).
2. Tests (a swab and/or blood tests) to check for infection in your knee.
I'm so glad you went. You are at the Huntsville hospital, right??? Hope so, honey. This really needs some serious attention. If you have a difficult time getting what you need, first contact your new surgeon's office to see if they can help you. Another option is to ask to talk to the hospital's patient advocate. Don't let them blow you off. You have serious issues going on and you need to have a complete check.
Don't get frustrated or angry....just be firm and keep asking who do I need to talk to to get my problems resolved.