Crying for no reason?

Emily • 25 / Married / Mama to Maddox (2009) and soon, Elijah (2016) too.
Today, I started crying out of nowhere because I decided I REALLY wanted a bag of Lay's Original flavor. Lol. This is my 4th pregnancy but this has got to be the worst one, I am an emotional mess with constant morning sickness. Anyone else crying over nothing?