I wouldn't plan on being able to fall asleep just three hours after eating shrooms. It's possible for people to fall asleep while coming down, but typically it'll take a couple of hours after you come down to fall asleep. If you ate them at 9, you probably won't be asleep until about 3. Smoking pot can help you fall asleep, but don't count on that because it's common for people to experience a prolonged trip when they smoke while coming down.