My emotions are all over the place!

Is anyone else having this problem? My emotions are all over the place, from sad to angry to emotional to overwhelmed. It's really putting a strain on my husband and my relationship. We are arguing a lot over small, stupid things. I feel horrible about it because we just got married this past August (less than 4 months ago) so we're supposed to still be in the "honeymoon phase". I'm horrible at communicating, what I believe to be one of my side effects of an abusive childhood and having to learn to survive. And I feel like he's not being supportive. Like when I told him I was nauseous/tired/extremely fatigued and told him it was due to the pregnancy, and he told me that I was being ridiculous that these things didn't occur until later on in the pregnancy (I'm almost 6 weeks). Mind you, this will be the first child for both of us. It was frustrating because he was clearly wrong and not an expert in the matter even though he thinks he knows everything. Also, I invited him to this app along with a couple other pregnancy apps and he won't download them. I tried to tell him how it gives you day-by-day updates on the baby's development and asked him how cool was that, and he said it would be a lot cooler once the baby's here. So I feel like I'm doing this on my own and I'm overwhelmed. Any advice? Anyone going through/ has gone through the same thing and could provide some insight?