I was 27 when I had my first heartattack and like you, I waited all day to go to the ER because I did not want to go in for "nothing". It is way better to be safe then sorry! I think you should get checked out. Let us know!!!
While it is not as common, it is certainly possible for someone your age to have a heart attack. Don't take the chance, go to the Emergency Room.
First of all you are never too young to have heart issues. Second, I lost a classmate when he was 20 to a heart attack and 2 more a few years ago and they were 35 to heart attacks.
you should go get checked up and find out what this is about. not sure about the dry mouth issues, I feel that with the pain it could be a nerve issue. not sure if it could be a heart attack or not. but when in doubt call a doctor
good luck
michelle