Charlie is 2.5 months old, her Dr didn't mention any abnormalities at her 2 month baby well check but a day or 2 afterwards I noticed what felt like a dent in the back of her head. It never goes away, I thought the posterior fontanelle was the least noticeable but in her case it's not. She has normal wet diapers, normal poop, eats normal, act like an overall happy girl. Do you think I should be worried? She doesn't go back to the Dr until December.