laughing is soooooo important. try not to take everything seriously.
hormones also play a massive part, its a huge change to go through so try and be easy on each other. it does get easier as the baby phase passes.. try to be fair to eachother and have enough time with baby together, independently and also time as a couple. if you can get the balance right that helps a lot.
we have become a LOT closer but in our first year of ds1 life my oh was made redundant, i had to be the breadwinner and work ft, then my job went, my dad got cancer... its was effing awful looking back. but instead of doing anything drastic and shouting, we tried to be kind to eachother.
one of the best things to remember is both of you have to adapt, it may seem the other has it easy but have been the worker and sahm and both are hard, but both rewarding.. but both require compromise.
try to enjoy every second and instead of complaining at eachother try to give eachother a hug instead.
but you will go through trying times, its normal i think
xxxxxx