I went back to work when DD was 5 months old, as that was when mat leave ran out and I took an extra month unpaid.
She's 13, and we have a lovely bond still.
She learned a lot in crèche that I would not have been able to do or had the patience to do.
I kept my sanity by being back amongst grown ups for part of the day again, and talking about normal things.
I put her into a crèche near the office rather than near home (against the convention at the time) - it meant she commuted with DH and I until she went to primary school aged 4.75. She learned about cars, buses, trains and bicycles in those years (she is great at doing hand signals on the bike since the training in the seat behind DH's back!). When traffic was rubbish, I could pull over into a car park and give her an early dinner (bf), or we could sing together and I could talk to her in the mirror. And the odd occasion where she got a bug, I could get to the crèche pretty quickly compared to getting all the way back home to her.
But spending time in the evenings with her was more of a pleasure for me, as I had my dose of everyday adulating earlier.
All DMs feel guilty, no matter what their decisions are, that they are doing the wrong thing. And there is advice to say that you are doing the wrong thing no matter what you are doing.
But there is also advice about the way you are doing things being the right way, if you look in the right places. We just always automatically jump to the "mammy guilt" advice that we're doing it wrong first.
You're thinking about DC, and how it will impact them and trying to do your best for them. That is the sign of a good DM! THat, and one who also looks after herself, and the other parts of life (like having the paycheque coming in, having food on the table, having clean clothes to wear etc). On those latter 2 - food can be takeaway, or batch cooked and frozen, or prepped the night before, or grabbed en route home - just having food on the table is the goal, fabulous healthy nutricious.......organic, ethical, whatever - all those bits are bonuses and will come in time. And clothes - I bought loads of outfits that were quite wash and wear and could take staining - so I wasn't trying to keep up with laundry terribly mid-week, but always had a stack of things I could grab to restock the changing bag for crèche, had a spare outfit and nappy etc always in my car/travel bag, and something clean to wear each morning. Little jeans, tracksuits, ordinary tops that could get covered in tomato sauce or paint and I wasnt' upset etc - that kind of thing.