No judging but please help

Okay so my hubby and I have been togther for almost 6 years. We have a daughter and another on the way. Well I have noticed that if we arnt intimate for a while like a week or two for whatever reason (work, tired, my SPD ect) the we seem to be picky and more argumentative towards each other. When we are intimate on a regular basis ect we are close and never argue and have a great bond.