When did you go back to work?

I’m sad at the thought of having to go back to work, but at the same time, adult conversation and relationships sound nice lol. My husband will be home with the baby for 7 weeks when I go back, but our son will be starting daycare around 5 months old. Is it as hard as other moms say? leaving your baby to go back to work? As nice as it sounds to be out in the adult world again, and as hard as the newborn phase has been, I can’t help but feel as if it’s going to be the hardest thing ever.