Thanks for letting me vent

I have a 2 year old, I teach so I’m with kids all the time. My days off I’m with my daughter, weekdays I’m with my students then her. His days off are just him enjoying his time not realizing no matter how much I express I’m exhausted. First trimester symptoms kicking my butt, she’s wakes up in the middle of the night still which I must endure and never have time to breath. I wish I can rewind and be more careful so I couldn’t get pregnant. Feel like a single mom in a relationship. I’m trying to change my view since I can’t change what’s happening. But it’s hard. I don’t know what to do.