There can be several answers to the same thing sometimes, but the right answer depends on the "ACTUAL" conditions, AND the individual animal. For example...the temperature, snakes, especially young hatchling snakes need a certain amount of warmth to help them digest meals. Now I don't know what your temps are in it's enclosure, but optimumly, it should have a cooler side around 74-77 degrees(with small hide box), and a warm side(also with hide box) that's 81-85 degrees at the substrate level where the snake actually IS(inside the warm hide). This will allow the snake to thermoregulate it's temps as it sees fit for any given condition.
Now like you said, many(including me) will often feed young hatchlings every 4-5 days, sometimes slightly more often than that, but that is depending on meal size, species, and their individual ability to digest the meal.
Now is the time that I'm stressing you to feed it SMALL meals for a while(after the vet ordeal), yes, the smallest pinkies you can get(as you previously mentioned) because the snake obviously had a serious infection problem in it's intestinal tract, so I stress SMALL meals for this reason for a while to see if those are digested without problems.
Again, there's really no exact science to any of this, they are individual animals that can have different needs at times, THIS being one of those times after all the infection trauma.
Never mind what others have done with their animals, you just focus on the immediate needs of this one, and make sure the environment is like I previously mentioned, and do small, less frequent feedings for a while, and see how things go from there.
hope this helps some!
~Doug
-----
"Better to be silent and thought a fool, than to open mouth and remove any doubt!"