Sertraline and Sleep

Hello!

I've been taking Sertraline since the end of December. Did 25 mg for a week, 50 mg for a week, then 75 mg. I was still feeling anxious so I've been taking 100 mg for about two weeks now. I take it around noon every day. My problem is that I am not sleeping well at all. My anxiety is pretty much gone but I'm not sleeping. I don't want to stop it because it is helping. Has anyone experienced this and what did you do to improve sleep?