L.N.
Hi B.
a few things, I have never met a mom whose child slept through te night even at 3 months. the most common age when babies start sleeping through the night is between 3-5 months, realistically 6-9. mine started sleeping through the night at 6 months
also, cereal or anything of the sort if given before digestive system is fully formed can cause problems later on, like allergies, constipation, even tummy problems etc.
so emily is too young to sleep through the night is my opinion.
i had even tried giving more just before bedtime in terms of formula but my girls ended up throwing up so it was more damage than good.
just give it some time. next couple of months will be trying for you in terms of sleep deprivation but they should get back on track by october.
good luck
vlora