Lately I ve been having trouble sleeping because everytime I lay down, I can feel and hear my heart pounding all through my body, and it s keeping me up at night. I have been dealing with anxiety attacks lately, I ve been to several doctors in the past few weeks and even had an EKG during a trip to the emergency room, and my heart seems okay. What should I do? I m just afraid of something going undetected. I also have palpitations/fluttering feelings sometimes, more frequently now than ever before.