Hi Twin - you need to sit on the phone and insist that you talk to your doctor. You could be dealing with any one of many significant abdominal issues if you are experiencing all of that.
Don't leave a message, insist on waiting for him to come out of a room and be told that you are waiting to speak to him, unless you can get a time when you can speak to him directly. Don't explain what all is going on, just insist that it's urgent.
Stop your abx until you talk to him in case it's C Diff.
www.mrsasurvivors.org/c-difficile