Relationship struggles

So my husband and I have been together for 10 years and are married 2 years. We have a 1 year old and are expecting the second one in October. The last weeks/months we have a lot of arguments. I am a little moody during pregnancy. My husband is also very agitated since we bought a house and have to renovate a lot. So he is under a lot of stress. We don’t fight in front of our kid but I am sure he feels the tension between us. My son is not a great sleeper so I go to bed very early, so I hardly see my husband.. actually I am relieved that I don’t see him that much because then we can not fight. Most arguments are about stupid little things (when we visit grandparents, which floor we want in the new house etc.). I tried to sit down and talk to him but that ended up in another fight.. so now I am just waiting till things get better. I don’t know what to do anymore. And I know that when the baby comes in October things will get more difficult.