Hi, welcome to the ehealth forum and I am glad to help you.
The symptoms for the heart disease includes chest pain associated with shortness of breath, profuse, sweating, nausea, jaw ache, pain in the shoulders and arms etc. Heart disease is very rare at the so young age. Your symptoms might be due to anxiety disorder, stress and depression. You must keep in touch with your personal physician and get the reports of the tests already conducted and further work up if require.
Hope this helps. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.