Since your doctor had you "push" your daughter to drop her 4am feeding, she may not have adjusted her daytime feedings to accommodate it yet.
Basically babies drop feedings because they are able to take in larger amounts of nutrition at each meal until they no longer need the feeding they are dropping. For ex. if a baby is eating 30 oz of milk/formula a day, that might be done in 5 feedings of 6 oz, or 6 feedings of 5 oz (or any other combination). As the baby begins to consistently take 6 oz per feeding, the 6th feeding becomes unnecessary. If you continue to give her a 6th feeding, she may not take much, but it becomes a habit to wake for the feeding.
If she didn't compensate in her remaining meals for her 4am feeding, she very well may be hungry.
1. I would look at each feeding she's now getting, and see if she will take more during them.
2. If she's not on solids, start!
3. If she is on solids, (and you haven't already) make sure her solids follow her milk/formula. The milk/formula will remain her primary source of nutrition for a few more months, until she can take in enough solids, that is. This period of eating solids is to "learn" how to do that. It's also for simple pleasure of tastes and textures, as well as developing motor coordination (Cheerios!). At the same time, if your family eats the traditional 3 meals a day, then you need to transition and train her also.
4. Although the timing suggests hunger issues, you could also be dealing with teething. Our kids rarely fussed during the day, but would be up consistently at night when they had teeth coming in. You have several options Hyland's Teething tablets (homeopathic), Calms Forte 4 Kids (homeopathic), Tylenon (pain), and ibuprofen (pain and gum inflammation).
Hope it helps! Feel free to email me if I can help in any other way.