K.M.
From a mom of 2: the stats and charts and numbers right now are really just a curiosity if everything is in the 'normal' range. Babies tell you exactly what they need and most will fight for it if parents don't supply it.
I'd certainly start introducing solid foods now that she is 'asking' for more food (talk to your pedi first if it makes you feel more comfortable)!
My pedi said that length is a much better measure of nutrition than weight is at that age, so I always paid more attention to my child's length from check-up to check-up rather than the weight.