welcome and yea I have this problem too. Its like I wake up from a nightmare in a panic gasping for breath because I feel like I can't breath. But what is actually happening to me is that I am breathing so fast that my body goes int hyperventilation, which blurs my vision and makes me lightheaded and feeling like I am going to pass out. What helps me is opening a window so I can feel the cold air coming so I know theres plenty of air in the room. Then is a matter of slowing myself down so I put on my headphones and mentally singing along with the music and making myself stop gasping for breath but instead take a breath when the singer takes a breath. By the end of t he song I am breathinng normally again and my vision has cleared back to normal.