why does my mom get so irrationally angry with me when I start to cry

This is why Im so avoidant ✌(´•ω•̥`)

"No, no none of that. Dont do that" and I'm tearing up because I'm worried I'm gonna have to move back here after I leave because what if we don't have enough money? What if we cant find a place to stay until my fiance gets a job? What if it's too expensive, or the jobs don't want us for some reason? 

I'm scared and I'm sad and I'm not allowed to be. It's so unfair I hate everything right now I just want someone else to take over for me