5 months old any one else??

My baby just turned 5 months old and as of Thursday (last week) she started saying da da and bye bye!!! I was so shocked and thought no she can't be already talking I didn't say anything to anyone cause she's only 5 months and we was all eating at my mother in laws and she was getting mad cause I was changing her and said da da again and everyone was like aww she just said da da!! And now she makes the mouth movements like she's going to say ma ma she's growing way to fast!!