you may give her cold teether.
just follow the frequency of feeding according to your feeding table.
example: 4oz every 4hrs.
if she can only drink 2oz, give another 2oz after 2hrs.
give her soft food, so she will not chew much.
i think shes ok because shes active and not sick. you may also base her growth from her height, not just the weight.
continue her daily vitamins.