LW1 - Have you been this minimizing to your wife also? You say "a little" behind on bills, but money is so tight you don't even have 1 spare day to sort out the paycheck. That 1 day made you miss rent. I'm guessing it took months to get to this point.

Stop trying to pass it off as a small thing. I understand you don't want to worry her, but your wife thinks you aren't taking this seriously. And yes, exploding is a bad way to communicate, but that's her saying "this is serious". If you said "you're right, this is a really bad situation, and I'm stressed out too, and I regret leaving my first job, and I'm doing everything to get it fixed", she might calm down. She'll be reassured that you take stability seriously. But as long as you keep saying "no it's fine", she's hearing that you'd be ok with quitting another job and putting the family through this all over again.

P.S. She wants to hear "leaving my first job was a mistake and I won't do that again", not "I'll communicate more".