Endoscopy, sedation or throat spray

Hi

I am due to have a endoscopy,  to check esophagus as it is sore and I am struggling to swallow .

I am however extremely nervous about having the procedure .

Last time It was a large tube , I struggling and gagged , and tried to remove the tube myself as I felt I couldn't breathe .

I only received the throat spray .

This time I have been offered the sedation if that will help.

I am not keen on the sedation,  as I won't be aware of what is happening .

And so I can't allert them if any complications. 

Does anyone have any advice. 

Thanks