Firstly, it is okay to feel anxiety as soon as you change role, change job or when you transit to another job that gives you WLB. You don't need to feel guilty. Why? Because most couple as soon as they got a baby, they would like to have flexibility, WLB work opportunity in order to meet the needs of their children. However, usually this happened to most mum. Not all dad takes up job that has WLB. Sometimes they work shift while mum takes the office hours job or job that has WLB opportunity.
I have been work line pretty long, soon as I have better opportunity, I change, take the role and ensure before accepting it, my future employer meet my criteria and vice versa. In that way, it helps me fit in well. I mean tbh, I am not the only mum right, so I make them understand me and otherwise.
Having said that in SG, we need two working person to meet the needs/wants/goals/financial stability of our own family.
So, don't be worried about anything. As long as you are happy, child is in school, you get to spend time on weekend, you are doing perfectly great.