I was in the same boat as you. I am a workman's comp. case. They sent me back and I spiralled to a point where ten months later I'm still fighting. I would say get to your doctor asap. Walk out if you have to. It's crucial to rest, rest, rest.

If you need to go to the emergency room so all this can be documented if you cant see your MD.

I tried for awhile to stay at my work because I was stubborn and I was trying to tell myself I was ok...and I wasn't.