Constant pain in chest specifically left

I am having constant pain in chest on left side with feeling on uneasiness . Got my BP and Heart beat checked, everything is normal . BP is normally low ranging from 50-60 on lower side and 80-90 on upper side . Hear rate was 60. i have a lot of travelling approx 4-5 hours a day as i travel from Noida to Gurgaon for office daily by car . Have consulted few doctors and have been quoted the problem as stress and anxiety , was given anti anxiety and anti depressant medicines for which i took only one dose . Doctors have ruled out any problem pertaining heart . I normally feel as if heart is beating fast and feel lot of uneasiness and panic . can it also be related to gastro ? Please suggest .