relationship input

Sooo we've been married over a year. I had a miscarriage in the beginning. Now I'm pregnant again..My husband has a very very stressful job.. so some days when he gets home for a little bit he's like a brick wall to talk to.. or like this morning before going in he was dreading the day and was the same. We text on all his breaks.. so on his morning break he still seemed blahhh. I asked if he was grumpy he said not grumpy babe.. I asked if when he gets out will his mood be better (we are both previously divorced and have all 3 kids this weekend) he explained it's just work is really bugging him. So because of this i try to be positive like at 3:30 your out for the weekend! And upbeat but some days it takes a toll on me mentally like I just want to cry. I get it work sucks (I work also in healthcare, it can be hectic and stressful) today is a day when he answers are like point blank.. and i don't have it in me to be upbeat. This guy is the love of my life, in no way do I want to leave him or am I unhappy he's my best friend also. But I'm stuck. I've asked him not to bring work home or take it out on me and kids ect.. what else can I do? Does anyone else deal with this?