Having stomach acid,something stock in my throat , feeling that some mucus is blocking my airways and making it difficulty for me to breathing,heart palpitations and irregular heartbeat,feeling too weak,loss so much wait. I have a thyroid blood test the and t3 was normal but my T 4 was high, I did thyroid scan , a soft cystic was found in my thyroid. Could that be the cause of my problem , and what should I do.