Hi, may I answer your health queries right now ? Please type your query here... hey there , well am starting to have hard time breathing before i sleep and my heart starts beating fast and i sweat , sometimes i have a really nasty headache and lots of pressure over my left eye and sharp pain on the left side of my head , can you please help me , am very athletic , and i did many tests for my heart and brain and lungs , i have nothing , but why is this happening to me ?