Try not to stress.

My DS1 was a big boofa when born, but dropped down to 50th pc within a couple of months and then had a *loss* one month! But he's fine - they learn and they change and they go at their own pace.

If you are offering food, offering boob, keeping an eye on their nappies and their activity levels, you're doing everything tight.

She'll eat when she's hungry, and you'll spot it if she's not getting enough, or if she's sick.

Trust your instincts.