Hello, another one hear whose husband up-sticks and off-fucked one day, 20 months ago, leaving me in a helluva mess - financially, emotionally and physically. There isn't a street in my old home town that I haven't walked or driven down crying - so don't feel you're behaving anything other than "normally" for the circumstances.
Everyone will tell you 'it does get better' and not a single person is lying to you, although your head will say "but that's you, I'm different/not as strong/something that has you believing you will physically shake/writhe in agony/not stop crying/ever laugh again.
It's the only time you're wrong, and every one else is right!
The first six months or so, or just forgotten time - you do anything and everything to get through the 'five minutes' at a time, but you won't remember that much about this period of time, except it was hell!
See a doctor for medicine, sleep whenever you can if you can, eat if you can (healthy - even better, junk -fine). Get out of the house if you can, as often as you can - but don't beat yourself if you go to bed for days at a time, or just collapse on the floor in a sodden weepy mess.
Three things I learnt:
There's no fucking housework police.
Never believe a word of what he says.
It will take as long as it takes to come to terms with it. Let no fucker tell you to 'move on' - and if they do, tell them to off-fuck as well.
Take care.