Get an ECG immediately at neatest hospital if it's normal nothing much to worry... You should consult nearest physician if breathlessness associated with Swelling in your feet and ankles,Trouble breathing when you lie flat,High fever, chills and cough,Lips or fingertips turning blue,Wheezing etc...try eating several small meals instead of three large ones whenever you can...Avoid foods that irritate your stomach, especially those that are spicy, acidic, fried or fatty... avoid coffee,tea etc... Avoid stress,consider calming activities, such as meditation, yoga etc...sleep with head raised position and have dinner at least 2 hours before sleep..Consult nearest physician for clinical examination they will do the needful.