I did this recently too! And I am so glad to read this story, because barring the “unable to open the door” part, you and I had essentially the same experience! I want to go back and try again, but as much as I really wanted to, I found it so hard to relax! The woman at reception even gave me the whole “just empty your mind and allow yourself to think of nothingness” style speech at the start, but once I got in there, the first thing I did was go through the grocery list in my head, remember a couple of emails I had to write, and mentally draft up a couple of blog post ideas. I think it’s that same principal of needing to sleep when you’re not tired, then your paranoia about how you’re not asleep only fuels your inability to sleep even more.