I was seriously considering it the other day, albeit some degree of reluctance and realized that at this stage in my daughter's life (4 mths), it's still a bit too young for her and troublesome for me.
There are additional costs to consider, eg transportation to and fro the babysitter, bottles, storage & cooling materials for EBM and if the company that I work for isn't pro-BF, then I have to switch to formula which is super ex and not what I want at all. If I leave her with the babysitter, I have to make sure that it's someone with good hygiene habits, same tangent with me when it comes to education and care of babies as well as someone whom my daugther is comfy with. If leave with places like a nursery, I run the risk of her getting sick often.
Also, I dont't really want to miss her milestones right now.
At the end of it, I decided that it just wasn't worth it and that I'll stick with my original plan which is to be a stay at home mum for the first year.