Chronic Insomnia

Hi,
I really would appreciate some advise as I am now at a total loss. Since October i have been suffering from terrible in insomnia , waking up in the night after 2 - 3 hours sleep and then unable to go back to sleep. I was put on antidepressants in October, In December i was put on more antidepressants and zopiclone all having no real affect. I am utterly exhausted but still go running now and then and cycling so i am doing the exercise bit. I thought it might be SAD but that surely would be cured by the Antidepressants?

Work , family and life all suffering. I've tried everything sleep related ,i.e lavendar, exercise, valerien root , melatonin , vitamin b's , d3 , iron , magnesium and calcium.

Any suggestions, didn't happen in the summer months. Also i am type 1 diabetic , but have researched all insulin side affects and even stopped taking it for a few days with no results.
If this is not mental health related what could it be? I am going back to my doctor tomorrow and need some suggestions as what to try next otherwise he will just not bother.

Maybe it's time to look for a doctor who can offer more help with the sleep problem than your current doctor?

One suggestion I have is to see if staying up later would help your body build up enough sleep pressure to keep you sleeping through the night. If normally you go to bed at 11, try staying up till 12 or 12:30 and see if this makes a difference.

My guess is that part of your problem has to do with the short days that occur during the wintertime. Daylight helps reset circadian rhythms every day, and when there isn't as much daylight, my sleep suffers, too.