I dropped 2 very heavy pot lids on top of my left foot...it is so painful I have not slept and I can not bear weight on it...should I go have it xray.

Yes. If you are having that much pain, and unable to weight bear, then you need to get an Xray done.
Yes. Pain and inability to bear weight might indicate a fracture and imagining should be obtained.
Yes. If you cannot walk on it, you likely have a fracture and need a XR :-(. All the best and use crutches.