It sounds like you have a severe condition that would probably make you eligible for social security benefits. I would be happy to discuss with you! 770-982-2252. As to the workers' compensation injuries, I would discuss with a local Mass. attorney.
If a doctor says that your herniated disc was caused by your ankle condition, or that the ankle condition contributed to the resulting disc herniation, then that disc herniation may be covered under your workers' compensation claim. It is not a third party claim. The claims would be filed together. You will most probably need an attorney to properly handle this type of claim.