Hate my job

I've got a 2 year old and I HATE the fact I have to drag my son to different family members to go to work where I don't actually benefit from the money I earn. We're still always skint. My partner works full time and today my son is really poorly but I have to take him out in the rain for someone else to look after my poorly child because I have to go to work. It's bringing me down. And I HATE my job. They treat me like shit and it's boring. But than I think is it because a part of me doesn't want to work? I've rang up sick today to go pick my baby up. I've just had enough. But the money I earn does help us a bit. I think I'm a bit depressed but I just needed someone in the same position to tell me I'm not alone! I can't stop crying because either way I'm a bad mum. I don't work and can't send my son to nursery or I work and pass him around every day :(