should I stay or should I go....

Lately I've been feeling like I really don't love my fiancé and like I just want to end our relationship and leave. Most of our relationship we have gotten into some nasty arguments, we've been through a lot but it always seems to be something that we fight about. I feel like our relationship isn't healthy, neither of us is happy, we're tired, stressed and broke. I won't deny and admit that we have had great happy times together but even when we're happy there's always something to fight about. My fiancé is a great man, he's kind hearted and his intentions are good but there's a lot of things about him that I don't like that drive me crazy. I'm not the best woman either, I know I can be a total snatch and I know I hurt his feelings too, but he honestly makes me feel like I'm dumb and incapable of doing things. I feel like we rushed our relationship, we've only been together for 1 year and 7 months and we already have a 3 month old baby girl. We've been struggling with money and it has been so hard, he's the only one who works but he cant make ends meet. I want to get a job so I can help with bills but he won't allow me, we always argue when I say I'm getting a job. I feel like I have no say or rights in our relationship, and I don't want to be the woman who depends on her spouse for everything. I don't want to break his heart and leave him alone and with nothing but I also don't want to sacrifice my happiness and life to force something that isn't there. I also don't want my daughter to live in a split home, but is it better than living with people who aren't happy and are always going to argue? What advice do you ladies suggest? Should I just leave or should I try to work out our relationship?