18 months post facelift, neck lift and brow lift I have tightness, numbness and a burning sensation under my skin. Advice?

Its been 18months since full face, neck, and brow lift to lift eyelids. I am in enormous distress, from tightness and numbness and a burning sensation under my skin. My head and scalp feels like in a vice. I have had MRI and cat scan to head. Nothing seems to show up. My life has become very small and I fear for myself. Please, any advise and to what possible cause for what I am experiencing would be helpful. I am now 68 years, are generally healthy and outgoing.