as best you can (and i know it can be tricky in a situation like this..) but do whatever you can to try and stick to a 4 hr routine at this point.
i understand lo is tired but def start extending that morning A time a bit as she will keep being tired at that time b/c she is not sleeping for that two hrs at night kwim? so she is making up for it with that early nap.
could lo have discomfort/gas at all? what is the nature of the wakings? does it seems painful or playful? how are you responding to them??
at that age it is very very common for lo's to still wake for one or two feedings at night and generally the rule of thumb is if you settle and lo wakes with the hr than feed and assume it was hunger. if lo settles and sleeps longer than an hr than you can be pretty sure it wasn't hunger. have you tried doing the df at any different times and experimenting with it a bit? once you get lo on a straight 4 hr routine - have you thought about perhaps trying a cluster feed? once lo is older and able to handle those long night stretches without food better, it is always tricky changing something with a lo, but imo would be easier then as she will be more capable to do so kwim? good luck and let us know if you have more questions...keep us posted