If you are asking what an endoscopy is, yes, it is a camera inserted into the mouth and the doctor can see from the throat down to the stomach.
Just a utrasound, seeing dr on monday to see what guna hapn next??, are you talking about a camara?
what type of scan? Could maybe be a hiatal hernia. I think they need to do an endoscopy to see if you have that. It would feel like a lump in the sternum and could cause a lot of pain.