Is my baby overweight?

So my DD turned 5 months this week. I decided to weight her and measure her length. She's 27 inches long and weights 19.5lbs. I was looking online and she's above the average in weight and height for 5 month olds. I found a comment from a mommy who's son was in same situation and the doctor told her he's over weight. I'm worried when I take her to her six month old appt then her doc will say the same. She's mostly on breast milk and we give her formula twice a day.

I hear babies loose weight when they start teething or walking. But still I don't want her to be called overweight. Maybe because I was overweight while growing up.