Possibly have CHS or acid reflux

Just got back from a Dr.apt and they told me I could have acid reflux or CHS and wants me to stop smoking for 2 week. The only symptom I have is stomach pain/pressure. Normally I can eat something in the morning to help the pain and it usually goes away. Some times swallowing some air and releasing it back out usually helps. I don't throw up or anything and able to eat fine. This has been going on for a few months.