I've always been a chronic insomniac - waking up at about 3am. However, it got worse when we moved close to the sea - the sound of the crashing waves drove me crazy for a while - until I got used to the sound.
These days, I alternate between natural tabs like Valerian, Biral, lavender spray for my pillow.....also find that autogenic training is quite effective - slowly letting my body get heavier and heavier.....if all else fails, I log on and read what you are all saying...chuckle..
An alternative therapist once suggested Gaba and Melatonin but if you are on an anti-depressant, you also have to be careful of any interactions....often thought of weed, but would probably get arrested in my country...
Hope you resolve this soon....it really does undermine your ability to cope....