Anyone else feel like a live in babysitter?

I’m a sahm of two girls. 3 and 4 months old. My husband owns his own business and is busy. We also own two houses, one of which is getting renovated so we can move into it. My husband works a lot, but so do I being a sahm. It’s so easy for my husband to be able to go do things, he doesn’t have to ask. He just goes and does it because, well, I’m home to watch the kids and he doesn’t have to worry about who’s watching them. But when I want to do something I have to like make an appointment, or plan a few days ahead. Like I can’t just on a Saturday last minute be like “hey I’m gonna go get a pedicure”. but it’s easy for him to go and do pretty much whatever he wants. And he says well if it’s after the kids go to bed it’s not a big deal. But it’s just the point that it’s literally so easy for him to just be like ok I’m gonna go do this bye, and not have to worry about making a plan for who’s watching the kids and such because here I am to do it. And he always says “well you don’t ever make a plan” or “it’s not my fault you don’t ever make a plan to do something” and he’s insinuating I make plans to hang with friends. I don’t want to hang out with my friends. I want to do something for myself, BY MYSELF. Since I never get a moment of alone time besides my shower at night, and even then I have the baby monitor.

And no matter what I plan on doing if it involves money it’s a problem. Idk what he expects me to do? Go sit on a bench in a park by myself? Am I wrong?