The most important thing you have done is being persistent. Whatever it is that you have at your young age will not be helped by your worry, just be concerned and persistent. If you know of things that bring on symptoms, then don't do exercise, slow down with the laundry, and slow down with any activity. It takes time for medicine to go through the tests to try to piece together presenting atypical complaints. Stay out of the heat when you can and be careful standing or sitting up quickly. I now that's hard but you'll have your stress test soon which will confirm or rule out possible diagnoses, and help with the doctor's next step. Good Luck, be persistent and be slow. Joanincarolina.
Is there anything that it could be? Doctors have also found that my heart rate races when i stand or sit up and also my blood pressure plummets at the same time. It also gets worse in heat or when i'm doing any form of exercise. They also heard a murmur that was attributed to the valve disease.
It is not likely that mild or moderate valve disease with a normal ejection fraction could cause the severe debilitating symptoms you are feeling. A stress test is also unlikely to be positive given you age and atypical symptoms, but is reasonable given the fact that there is something deeply affecting your level of energy. If this is positive, then congenital abnormalities should be sought out first, possibly with a CT scan or an invasive angiogram. However, I think that this is also very unlikely given you severe symptoms and normal functioning heat on an echocardiogram.
Just to add a symptom I'm also short of breath during any activity even one as simple as gathering laundry or walking anywhere.
Any advice would be greatly appreciated!