I know if has been quite some time since you posted this (and it's been ages since I have been on this forum as well), but just wondering how you are getting on now?
Mainly as reading your post was like a mirror to myself. I used to love my job pre kids, used to go in early, stay back late and feeling like I was really getting results, but now it's just causing me anxiety and I feel like I am not doing a good enough job (always seem to be behind, forgetting to do things at times, and basically really beating myself up about it). I manage people too and dealing with their crap whilst trying to deal with my own issues is really taking its toll.
My youngest is 2.5 years old and I have been back at work for 2 years now. The anxiety I am feeling about work is spilling over to home, as I feel I am not doing any good with my kids either.
I know I could not go back to being a SAHM for a couple of reasons - firstly I want to work and secondly, I earn over twice as much as my husband does so it makes sense for him to be a SAHD. We've entertained the idea of me stepping down, but this would involve a move to the other side of the state where we could buy a cheaper house and therefore have no mortgage. Once my youngest is at school, my husband can potentially go back to work, but that's 3 years away and in the meantime I am miserable.
I'd love to hear from anyone who did this and how it worked out.