Quote Originally Posted by Catrin View Post
Even when I get to sleep I can't stay that way right now...
This sounds VERY familiar to me on days when I have that afternoon cup of coffee. Even when I can get to sleep, it seems to make my sleep very light and I keep waking up too easily- I can't get deeply asleep. It took me YEARS to recognize that this was due to having some caffeine a little too late in the afternoon. Now I know that I need about 10 hours after the caffeine for it not to affect my sleep at all. Your mileage may vary.
Your description really rings a bell with me on the subtle lingering effects of caffeine. Been there done that. I hope that's the answer for you, since it's pretty easily solved.