Oh man - sleep deprivation!! Its a killer. All those thoughts rushinh through your head.....
Maybe make sure you are resting at these times? So if you cant sleep, get up and read a book or something.

A good sleep tip is: Only use your bedroom for sleeping and sex. Dont confuse your mind by introducing other elements like TV or reading (at night) or music. If you wake up in the night, dont do something in bed, because you are essentially telling your body - "Its OK that you dont want to rest, so I'll let you do something else you really enjoy". By rewarding, you dont stop the tendency to wake up.

I hope that makes sense? So if you cant sleep, and cant have sex to get back to sleep try getting up until you are sleepy again, and then toddle back to bed.

Fi