You don’t “have to” do something. You “get to” do it. It is a privilege that you are able to take care of whatever task you are assigned with doing. There are many people out there less fortunate than you are. So your 3-month old is having trouble sleeping at night, crying, and keeping you awake? Well, you are blessed with the opportunity to console him/her. There are plenty of people in the world who desperately want children and, for whatever reason, are unable to have them. You had a fight with your parents? Some people have lost their parents prematurely.
Think about the big picture. Why stress over something so small like “having” to do something? Will this affect you next week? What about next year? Will you even remember this event in 10 years? Make the most of life. Enjoy it. Don’t sweat the small stuff.