I can't sleep at night

I have been depressed (not diagnosed so idk) and suicidal for some time and I think I may have OCD and am also a bit stressed for a few nights and hence can't sleep at night

For eg I wanted to sleep at 12 last night went to sleep at 1am kept crying till 2-3 and then must've been awake for another half an hour

What should I do ? Tip me on how to sleep ion wanna talk Abt my suicidal thoughts here also I will delete this when I get some solid advice