Head circumference

I just had my 2 month appointment for my baby. They said her head grew fast as it went from 33 when she was born to now 39. Which is 71 percentile. The ped wasn’t concerned because she said she’s overall grown a lot. She left the hospital at 5 lbs 10 oz and now weights 10 lbs 10 oz. the ped thinks it’s just because of how much she’s grown. But now I’m so worried. I’m going to go back at 3 months to check. Has this happened to anyone and everything’s been okay?