Hello Honduras4life, how are you?
I'm not a doctor.
Sounds like a pre-panic effect, caused by Anxiety.
An Anxiety attack shows similar symptoms to a heart attack, and so does acid reflux. Take note of your activities just prior to the chest tightening etc..
Could it be something you ate, causing acid reflux?
When in doubt, see a doctor ASAP or go to the hospital.
Let us know what you did. TY.