Well, rest assured you are NOT the only one who has had these problems. My anxiety started as some hypochondria, I was having heart palpatitions and I was scared to death I was going to have a heart attack or that something was going to go majorly wrong. I know my symptoms were always MUCH worse at night. I made a couple of ER visits in the middle of the night and always felt worse on the weekends too, probably due to the fact that there were no doctors available. Eventually my anxiety got to the point where I couldn't tolorate it anymore and I too started on Lexapro. It works great for me, but obviously everyone is different. I'd go ahead and try the Lunesta. I was given some Ambien CR, but to be honest I didn't like it. I woke up in the morning just as anxious as ever, but I wasn't taking any medication to help with the anxiety. I think for you it's a good idea to help you get some sleep. You're never at your best when you're extremely tired anyhow and it doesn't give your body any break from the anxiety cycle, which it sounds like you need right now. As gm pointed out... you ARE NOT going to die, your body won't let that happen. I'd always cycle through nights where I'd sleep very little for 3-5 days and then would get 1-2 nights where I slept like a rock just because I was so exhausted. For me, the reduction in anxiety has helped me sleep greatly now. I also take Klonopin at night, but I've noticed that it's not really "putting me out" like it used to either, so I think it's just the medication allowing my mind to relax that's allowing me to sleep better. I think you've done the wise thing in getting on some medications and I'd definitely take the Lunesta tonight and get some sleep for a week or two while the Lexapro has a chance to get in and start working. I'm in my third week and things are going wonderfully. Good luck and get some good rest!