Broken shut off valve

You know when you are laying in bed at night and things keep rolling through your head?! I can't seem to get it to STOP!!! What the heck? For at least the last week I have been up until crazy hours in the morning cause my brain won't SHUT OFF!!!! And I can't find the switch. Some things that keep going through my head are things that I said, oh 10 years ago. Uh, yeah, done and over and I'm sure everyone has forgotten about it but ME!! I've been thinking about stuff that I have said to people at church, wondering if they think I'm crazy, or better yet, know I'm crazy. Sometimes I think about stuff that happened in 6th grade, or 10th grade, or, or, or , you get the picture. Then I start thinking about the things I have to do the next day. Although I can usually quiet those things by writing them down, which is why I have a notebook beside my bed. Eventually I get so tired that I fall asleep in the middle of a thought, luckily. But this is killing me. I had a friend tell me today that I looked tired. Uh, yeah, cause I can't seem to GO TO SLEEP!!! And then the dog wakes me up at 6 to go to the bathroom and then the cat wakes me up at 7 cause he wants in the house. I'm ready to shoot both the animals, just cause they won't let me sleep. I guess one thing is good, I go to bed early because it is taking me forever to get to sleep and Sean isn't waking me up when he gets home. Although there have been nights when I have been up to greet him, at midnight. oh, this has got to stop. Yes, you can all laugh at me, cause I am laughing at myself. Maybe that's the craziness setting in from lack of sleep. oy. Any suggestions as to the location of the shut off valve? and I really hate chamomile tea, so don't even go there:)