Hello, I have been feeling dizzy, blurry vision, feeling my heart beat in my throat, feeling tired and sleepy through out the day. I feel the heartbeat in my throat more when I am sitting or lying down and trying to sleep. My right eye lid has been swelling up too. I have been feeling my heart beat in my neck for 5 months but this past week it got worse. My doctor sent me for a thyroid ultrasound but it was okay, doctor said my gloitor or thyroid is a little big but not a problem.