@mkins8 - yeah I only feel them at night. It also appears to have a direct link to adrenaline for me. My wife and I made love before going to sleep, and it was the first and only time it happened to me without first falling asleep normally and then being awoken in the middle of the night. That really got me thinking/wondering if the adrenaline release really magnified the anxiety and threw whatever neurological 'stuff' out of whack in the same way of waking up in the middle of the night. They say adrenaline is what wakes you up in the morning naturally but I've read from other doctors that the internal vibration feeling could be your brain not realizing you're awake and either a normal sleep feeling that you normally don't realize because you're asleep, or adrenaline related to it waking you up. I feel like they'll go away once the body/mind somehow go back into a normal rhythm. Once it gets knocked out of whack though, there's no 'easy' way to determine when that may be. I honestly felt over the last several days I was extremely happy, in good spirits, not worrying about anything, but it seems whatever it is, is rooted in my subconscious or just hasn't been able to get me neurologically back in a normal state.