Which antidepressants did you try? It takes a long time to find the right one sometimes. I've tried 6 different ones.
Just wondered if you'd tried mirtazapine ... It's not an ssri like some, tends to be better tolerated ime. Having said that, sertraline can be great for anxiety, but can make your feel a bit sick at first, it does pass on a week or two tho.
I'd say it's definitely worth a try and getting past the first few weeks as it usually improves.
Above all look after yourself, so things you like, watch favourite films, read favourite books if you can concentrate, great yourself to something that'll make you smile if you can.
Have you looked into online counselling? If you can afford it?
My friend recommends the Thrive programme, there is a book you can follow without the sessions because they're quite expensive.
I also recommend Matt Haigs book, Reasons to stay alive 
I've been where you are, a few times. I've just started antidepressants again - I'm taking duloxetine- and can feel it starting to kick in, feel slightly better.
I hope you can find some help 