Breathlessness on exertion. Feel it.

Dear doctor I want to ask you one important question is breathlessness on exertion like climbing stairs and walking can caused due to psychological problems.. History Due to chest pain i visited 4-5 doctor done ECG, 2DECho TMT test multiple ECG all normal. 2 doctor told me to visit psychiatrists so visited before month doctor start Sertaline 50mg morning and etizolam+propanalol at night but 2-3 day i never get sleep and started chest tightness at night and wakeup many times in night so stopped medicine after 3 days..also caused severe gastric problem also..after done treatment of gastritis after 8 days.. Since then I have started breathlessness while climbing stairs and tightness it's feel mild while walking also i have sleeping problem since month.. Can it possible due to sleep disturbances or should I visit other cardiologist and do next test.. actually I was very worried about heart but now this breathlessness symptoms started physically Now stopped all medicine still feel it..