Broke down!! (Long story)

So I finally did it! I just broke down I couldn't hold it in anymore. It all started when I my fiance (once again) got fired from his job. We're now behind on majority of our house bills b/c he's been out of work for a month. We already had a hard time paying them when he was working now it's just impossible. Our gas, and lights are the verge of getting cut off. The rents late, and I'm just getting caught on my bills outside the house like car, phone, insurance, ect... He's always telling me to not stress and stay positive so I have and I've tried. I work over 40 hours a week and then come home and take care of the house. It's hard but I try to stay positive like he says. So we went over my grandparents house today to spend time with my family (this is what set me off) I made a joke about not having enough gas to last for the week and my grandpa just looks at my fiancé and I and says " I don't understand why yall are here and not working two jobs. I don't understand yall, yall will never stop struggling". That just did it for me! It's like he expects us to wake up one day and have money. We're both trying to go back in school full-time and work full-time. That's not the first time my grandpa said something like that to us. We're only 23 and trying to do everything on our own. I really am trying to make everything work I don't know what to do and of course my fiancé just says "think positive don't be upset" OH SHUT UP!!! I just snapped and said some awful things to him. We just left. I'm not sure if I'm overreacting or what??? My grandpa can be an ass sometimes so he just said something I didn't need to hear. The tone in his voice was just rude and sarcastic. What do you think ladies? Did I overreact? Any advice is needed! ANYTHING!