I use antidepressants almost all my life and I see how they develop getting better and better. But they don't help me to sleep well anyway. I have to go
here
because it helps.
Certain Anti-depressants actually stop sleep! So maybe it's worth seeing your G.P and seeing if you need your medication tweaking. I actually take an anti-depressant to help me relax and fall asleep so certain ones do help you relax, chill and help you with getting to sleep. But sometimes it's your mind that is stopping you going to sleep so you need to find a way to get your head cleared so you can go to sleep. Here are some sites with tips on helping you prepare yourself for sleep:-