anavar has an 8 hour half life. take your fist 5mg dose first thing in the morning , 7am . take your second dose in the afternoon around 3pm .. by time you hit the sack at 10-11pm or so it will be out of your system.
on a second note: for some people when they are in a highly anabolic state, they can get a bit restless (everything in the body is working 100%) and it becomes hard to settle down, relax , and fall asleep; doubtful that 10mg of var has you that anabolic . but then again women can respond very well to a first run of Var.
try 10mg of Melatonin 30 mins before bed