Getting through it all...
Sometimes there is no coping. All you can do is curl up into a ball and cry your heart out, until you realise you're just doing it for effect. Out of self-pity. Life is still going on, it won't help.
I'm lucky, because living on a farm there is always work to do.
That's what does it for me. Work. Fixing fences, building gates, digging hoes, chopping trees, mucking out, even just watching the animals is very important. And it all helps. To take your mind of things, off everything. To think only about what you're doing at that moment. It doesn't take your troubles away, or solve your problems, but a clear mind is the only way you can get through all the overwhelming stuff.
There are other ways such as walking, sometimes walking up our long lane will calm me down enough, either listening to nature or singing as loudly and as badly as possible to various songs. Playing a musical instrument has a very calming effect on people, if I happen to be cross, playing something loud like an accordion is great for letting out frustration.
That's how I get through a bad time. Different methods for different moods.