Could this be depression?

I currently have a 5 month old baby girl with my husband. I love them very much! Here lately I have felt very irritated towards everyone outside our little family. I took a job subbing in the school cafeteria and trained a few days last month. My mom works on one of the campuses and heard the other co workers saying how horrible I was. IT WAS TRAINING that’s why I didn’t know where anything was. They treated me like I was a pile of poo. So they called me tonight to see if I would work tomorrow. I told them no partially because how they treated me and the other part because I don’t want my Dad to keep her. All he does, is mouth how my little girl is spoilt to me. I’m sorry but I’m the one with her most of the time! My husband is the only one right now with a full time steady job and after I told them no I couldn’t work I feel bad about not contributing more to our household. I just feel like a piece of crap. I feel like I don’t do enough although I’m at home all day and clean and take care of our little girl. Idk 🤷‍♀️ I’m just bummed! Idk what to do I just flat don’t feel like myself at all. I would rather be balled up at the house and not see all day than have anyone bother me and little girl. Is this bad??? HELP!