Cholecystectomy 7 months ago now stomach burning and nausea even if not eaten. if bile reflux is happening shouldn't my pyloric valve had to be damage?

No: Its normal to have some bile on our stomach. Also, its not really possible to accidentally damage the pyloric valve. Even if story cut a hole in it, once the hole healed, the valve would most likely function normally. Ask your surgeon or primary care if a GI consult and upper endoscopy are appropriate. May have been a stomach problem all along. Hope this helps!