Confession: I feel like a horrible mother

My son is 14 months old and his dad and I are still together. So all 3 of us live together. Sometimes, I don't have the time to live up to my boyfriends expectations. He wants me to make sure the house is kept up, and make sure the baby is taken care of. But when the baby keeps making a mess of something I just cleaned, I get so frustrated. But then again, I have perfectionist tendencies and really want everything a certain way. But here lately, I've been slacking off more than usual and sometimes, my boyfriend gets mad at me about that. And it makes me feel like I'm not a good mother. Because clearly I should be able to have a clean house and have a baby well taken care of and if I don't then I'm a bad mom. For either 1) having a clean house and not watching the baby as much or 2) watching the baby's every move and the house is a mess. I don't know what to do anymore. I want to be a good mom....but I don't know how to be. A few year ago I got diagnosed with bipolar type schizoaffective disorder. And while I may not show it very often, I do have it. And when I get into one of my low periods, it can get super bad. Like I'll cry all the time and I would always think that everyone who loves me only says it to make me happy or some shit like that. And now, whenever I feel I do something wrong, I take it out on everyone around me. And I wish I could somehow say I was normal, but I'm not. And I don't know how I'm ever going to manage having more kids....I wish I knew what to do. I don't want to feel like I'm a horrible mom...