As a totally single parent and sole breadwinner, I absolutely get it. I was far, far abroad, so far, far away from any family hands on support. But, whisper it, the blessing was I could afford a full time nanny (dear second mum and 'wife') which was the only way I got through and stayed there for so long! When I did bring him 'back' to Scotland - he'd never lived here before - I so enjoyed your familiar voice on the radio again.
Believe me, I so felt for you when you divulged how things were falling apart for you, it was so familiar, and in this country it was then so hard for me too on a different level. I loved your first Christmas tree! As an evening person I have had huge admiration of you managing the horror concept of 3am starts.
Yet at some point it gets you.
Even with my luxury of full time personal child care, at one point I moved my working hours so I could take my wee boy to playgroup. It has to be done otherwise those experiences of his would have gone without me having been part of it.
Good luck with new challenges and opportunities and juggling. The two of you will always be the unit that matters.