Advise please!!

My husband and I have known each other since we were 15.. Were now 28 and 29.. We've been together for over a year.. Expecting our first child together. I have 3 children from a previous marriage but only 1 lives with us.. He works overnights an hour away and I work evenings in town. We only have one vehicle and my son goes to school in the mornings.. We are extremely stressed.. And most times end up taking it out on each other.. We love each other dearly.. And just don't know what to do or how to handle it. Any input would help!