2 months old is early..
I'd say its an ear infection if she's rubbing her ears.
Alex had really bad ear infections about 3 months ago coming and going over 4 weeks.
I found off the doctor that babies heads have small tubes between the ears and throat, unlike adults whose are longer, and that drinking milk laying fully or quite far onto their backs or laying down straight after drinking the milk causes the milk to go into the ear from the throat and this causes an infection.
Not too sure how true this is like, was pretty sceptical myself...however I fed alex right up after that and none have returned so far...but i dont know lol
Good luck and hope she feels better soon

xx