The first year of parenthood is a roller coaster of emotions, arguments, and overwhelming happiness. If it seems impossible for all of that to coincide in one house, just wait until it's the middle of the night, you and your partner are both exhausted, but fully in love with the little human you created. Although the happiness is undeniable, you and your partner will likely partake in your fair share of bickering over the first months as a parent. There are lots of fights all couples have in the first year of parenting that make them stronger in the long run.
I remember being angry with my husband for just about everything under the sun. Not being happy enough (or appearing happy enough), not changing enough diapers, you name it. And though it's easy to blame hormones and lack of sleep, more often than not, the problem was lack of willingness to compromise. Parenting is hard, and marriage is hard, and combining the two can feel impossible at times.
Remembering that these seemingly insurmountable arguments will ultimately make your relationship stronger — both as parents and as a couple, can make all of the sleeplessness and arguments worth it in the end.