question: I am a 45 year old women in good health..But lately I feel like I am wearing my heart out. I feel a pressure on my chest when I sleep on my back. I feel like I have to a take deeper breaths to get good air. My heart beat seems very strong and forceful like It is straining. I have no other symptoms. I have been to the doctor and they are doing tests... Thyroid, allergies and a halter monitor for my heart soon. When ever I have gone to the doctors, they always see a normal  blood pressure, EKG and blood work for me. Will they be able to detect  a week valve or heart disease with any of these tests? I am  anxious of the process to weed things out. I dont know what to do for myself because I think it is something serious with no time to waste.