Carolina melon

I'm 11 days post up, and I have to ask about these symptoms. The pain of surgery is gone, but I'm so unsteady that I can barely do anything. I can get out and walk some, but definitely not clear-headed enough to drive. Most of the time I feel very drunk, and all I've had is Water. it might get a little better after some rest, but it never goes away completely. I'm trying to stay hydrated and keep up with Protein needs. I tried walking heel-toe on a straight line (classic DUI test), and failed miserably. No real nausea, no throwing up, just fatigue and spinning head. Help, please. :-(