Pregnant with twins😱

The Mrs. • 34yrs Young, happily married TTC #1
I knew that I was gaining kind of quick but thought nothing of it! But here I am pregnant with twins, We are so blessed now I'm trying to get used to the idea which is a bit overwhelming. My husband is worried about me having a miscarriage and barely lets me breath, I find we are constantly having issues and arguing over everything that we never would even argue about before. Idk what's happening but I miss my rock and right now he's not what I'm used to dealing with help any advice?