Regarding Michelle and the working mum thing... Perhaps it's an idea for those of us who are parents to remember being like Michelle with all the ideas of what we will and won't do and how it will all work. It's totally normal to have all those plans of what it will be like.
Me? I was going to spend the first year at home, be a keen breastfeeder, then go back to work and have children who were flexible and fitted in with my schedule.
As it turned out, my son was disabled so returning to work was out of the question. But even if he wasn't disabled, I ended up feeling like the best place for me to be was at home anyway. Breastfeeding him was a disaster and he was on forumla within 3 weeks and I turned into a sleep/routine nazi and I also had issues with depression. Yep, love how my plans worked out!
Not saying that one's plans can't work out - it may go completely to plan. But I would be a hypocrite to criticise someone else's plans :-)
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.