Have you talked to your doctor about your symptoms?
GBS from a flu shot is RARE, but it can happen. GBS is rare, anyway.
The symptoms of GBS are progressive - they start and spread and get worse. They often start in the legs and spread up to the rest of your body.
I don't know that you have GBS - I'm not a doctor and can't diagnose in any case, but you should talk to your doctor about your symptoms. You can have reactions to flu shots that aren't GBS.