I am so sorry to hear about your depression.
When we are depressed, we always have self pity and think we got hurt and never have patience to think back whether we did anything to fuel the argument or unconsiously added to the problem.
So, let your mind settle down first. Then recollect the issues. If you feel there is a small percent of mistake is from your side, then don't feel bad to ask a sorry. This may melt your husband and make him to come up with his own sorry or opinions.
Even if not your mistake, you can start with "Sorry that we had a bad conflict" and can try to explain your points in a soft manner, if you value your relationship.
Breaking is always easy, but successful relationship lies in the hands of those who can forgive each other.