I Had A Job Required Flu Shot. 7 Days Later,

I had a job required flu shot. 7 days later, I was in my bathroom, bent over to flick something of my pants. Legs became Jelly and I have not been able to walk since. I have chronic kidney disease and vitamin d deficiency. no one can tell me what is wrong with me. Doctors think It could be from the flu shot. They are saying Polyradiculoneuropathy. Is this possible I will never walk again?