Your baby isn't rolling over yet. Your pediatrician looked at her and said, "She's fine, this is in the normal range." But at playgroup, everyone else's baby is basically doing cartwheels. And somewhere inside, you just feel like something's wrong.
Then a quiet, sneaky thing happens. The intensity of the feeling starts to feel like proof of the size of the problem. "If I feel this strongly that something's wrong, something must be wrong." Nicole calls this a cognitive distortion, a filter on your thoughts that isn't accurate but feels completely true.
And it often leads somewhere: you stop going to playgroup so you don't have to feel it. Which only turns the volume up.
The move: compassion first, then separate the two things. There's a lot of shame tangled up in this. Mom guilt, mom shame, all of it. So talk to yourself the way you'd talk to a good friend. Then untangle two things that got fused together: your feeling is real, and whether there's an actual problem is a separate question. You're allowed to feel disappointed your baby isn't rolling over yet, and you're allowed to trust the pediatrician who says she's fine. Both are true. Feel the disappointment. And try not to stack a feeling on top of the feeling ("I shouldn't even be feeling this").