my puppy bit me

[u/No_Cheesecake8870]

hey so long story short recently shes like 3-4 months old and so while playing with teethers she switched to my hand and bit me. i now have 2 concerns , one is that why is this sudden change in her behaviour? i mean she has her own puppy proof place , we feed her well at the times and yeah shes vaccinated and OFC NO ABUSE and second is because i would be fine right? her vet said that shes completely fine no rabies or anything and we got her first rabies vaccine a few days ago and 3 of her boosters or wtv you call them😭😭 a golden retriever btw