Crabby 13 month old

Je

My 13 month old just seems crabby all the time. To the point where I feel like I'm doing something wrong, or failing her as her mommy. My husband is bringing her to the clinic to have her ears checked for an ear infection and to discuss a possible milk allergy (she started getting really crabby around the time we switched her to cows milk). She is also teething. Anyone else's little super crabby and moody at this age???

I just need some reassurance...