It's a hard slog.
I co-slept when things were particularly bad. Still sleep deprived, but slightly better.
I got sleep ins on the weekend. No weekday naps at that age as I was working unfortunately, but that's another good idea. HAving granma or someone else come in for a few hours so you can catch up a bit can help.
I think the key thing is to make things as easy as possible for yourself - do whatever works best, and forget about everything that isn't absolutely essential.