Does anyone else's SO have random bouts of financial panic?

Clare • momma to some pretty radical kids and wife to a bodacious babe of a husband. &crazy cat lady ^•+•^
My fiancé was shocked when we found out we're expecting again but he was excited after the shock wore off, now he's in this financial panic mode which will last a few hours then it goes away. Haha 
 It drives me bonkers! I felt bad but I had to yell at him the other day!  Are your SO the same way?