I just finished answering your other thread about age gap, in which you talked about trying to get pregnant. I just wanted to add, make sure the problems in the relationship are fixed before you try for a pregnancy. I obviously don't know you personally so I don't know if it's your case, but a lot of people seem to assume that having a kid can "fix" a relationship, that once the baby is there things will fall into place.
That is NOT true, and having a baby can rock the healthiest of relationships. In a relationship that is already rocky, it can be disastrous. So, I'm not completely sure how to help your specific relationship, but at least delaying your own pregnancy would avoid worsening it even more.
Other than that, a lot of talking seems to be in order, and make sure you know what you want and stand for it.