I Can't Sleep

Every once in a while I get into this mode where I can not sleep. I try just about everything from taking sleep aids to using ear plugs but I am just not sleepy. Ken always tells me that I should go and see a sleep specialist because I can lay awake for hours. I have to say it seems to happen more when I know that I am really stressed out. It seems that sometimes I have so much to do and there is just not enough time to do it in. I lay awake in bed trying to think when and how I can manage to get everything done. I know that it does not help me get things done better but I can not help but just to think about it all the time. Ken always tells me that is the reason that I can not sleep. He says that he thinks about nothing when he is trying to sleep. I have tried to do many different thing but when I try and think of nothing I still find myself trying to had to not think. It also keeps me awake at night.
I have not had this happen for a while now but I am sure once school picks up it will happen as it does every year. I do like to use sleep aids when I am not able to sleep alone.