I went back to work when my son was 7 months old and 4 days a week. To be honest I didn't find it too hard! I was sick of being at home and was getting really down about being stuck in the house (my partner took my car to work), never having any money (my partner did for himself...), and just feeling crap in general. When I went back to work I felt so much better, I regained my independence, had money and had a routine back. It really made me feel good! I am 18.5 weeks with our second and will be going back when bub is around 5 months but this time while I'm off I'll make sure my partner isn't selfish and I don't struggle on my own or else I'll do it on my own! But honestly it's a great feeling going to work and having your own other life involving adult interaction!