2 months today!

Diana • Wife since 5/25/13 first time mom to the beautiful Olivia Rho

My little girl is two months old today! I honestly can't believe it! Yesterday she was cranky/fussy off and on all day and kept taking little cat naps ( which she doesn't usually take naps) and didn't sleep very well last night she usually does... could all this be from a growth spurt? And if so how long do growth spurts last? (If that last question makes sense)