A little help

So me and my fiancé/baby daddy have been together for about 2 years. We’re going through a rough patch now where we argue a lot, he’s not saving money for the baby, we’re stressed and just not doing well. We argue and I think there’s some trust issues too. We’ve taken a little time apart and decided to try again. What are some ways y’all keep a good relationship or ways to get out of this tough time?