Hi. Sorry you are having this sleep difficulty. Waking up anxious is not uncommon when stressed, worried or suffering true anxiety. Are you worried about anything right now? I can't tell you that your health is fine--- perhaps a physical would alleviate your worry about that. Most likely though, it is. And when we are hyper focused on it, we can feel all sorts of things like a cold chest. Try some deep breathing, breath in for four, out for four and hold two. Repeat. This really helps. Focus on the breathing. Try some visualization as well--- basically thinking happy thoughts. I think of a vacation house I'd love to go to on the beach (no plan to really go there, LOL) I don't know if you are male or female but I have this cyclically related to my hormones and cycle. It's a pain. Talk to your doctor if this persists, okay? Oh, and eat well, get exercise. This helps. good luck