Breathlessness on mild exertion all heart lung n blood work normal i have lpr reflux read on forum it can cause breathlessness do i need more test?

See a physician: You should have a stress test for further evaluation. Have a seen a cardiologist ? If not you should see one .

Need more info: How much do you weigh? How tall are you? If your doctor has cleared you to do exercise, start going doing it. You may start with taking a walk every day, as tolerated and increase the activity gradually. Reflux may be one symptom of being overweight.