Teething???

Can she already be teething? She has these white little dots on her bottom middle right tooth. She's a bit fussier, drooling more tho not to the point where it's dribbling down her chin. She doesn't want to nurse and bites down when she does. Babies can apparently teeth as early at 3 months. She'll be 4 months tomorrow. Wow. Or she's just being a brat. We'll see.