Changes you detect lumps and bumps are signs. A sense of fullness when you swallow is another I've been told but this doesn't neccesarily men you have recurrance. Only a Dr./biopsy/scan can tell you for sure.
I think you should see a Dr. to make sure you are OK. Have you tried getting Medicaid? I'm sorry I don't know how that all works.
Hoping this is nothing. K