I came here this morning to post the same question!! I slept like a rock the first few nights but since then it has been difficult.
I have been trying to exhaust myself by getting out and walking, walking, walking as much as I can. The fresh air seems to help. The heat is making it more difficult though. Even though I have air conditioning it feels like I have a little furnace inside that keeps cranking.
I also read until my eyes get tired and that helps. My brain doesn't always want to shut off so I try a beginners meditation exercise where you let the thoughts come, recognize them, and visualize them drifting away.
All of these help, but none of them work, you know? All we can do is wait it out and have faith in those who have been there that it will pass.
D.