This was an issue that made me totally, absolutely amazed! I'm
not sure if the same level of care can be assured in Singapore, but
judging by what I've seen so far, I'm just awed!
Most patients would still be in bed on the PCA (Patient-Controlled
Analgesic Pump with Morphine or Pethidine) to stop the pain the
first day post-op. Most breeze through their first night with the
Morphine doing a good job of controlling the pain but if you're
like one of those few individuals who are built like elephants and
hippos and need like the entire arsenal of morphine before you get
comfort, then the pain will bother you more. 
Anyways, most of them start eating during the 5th or 6th hour
post-op with very few throwing up from it. Depending on the
procedure and the extent of the op, a few of them will be seen by
the Physio the next day and sat in bed, then asked to stand up for
a few mins. On the 2nd day post-op, the patients will be asked to
take one step further by walking a few steps towards the door of
the room, and depending on how well they tolerate it, they will be
walked out of the room, with or without walking aids.
Most are discharged by Day Five, assuming nothing untoward happens.
Of course, that's in general course there are those who are
discharged in Day 3, and others who are discharged on Day 8 or
so.
Why don't you find out more about the procedure that's involved in
your case and then I can give you more info? 
But
generally, I'm just plain amazed at how speedy the recovery can be.
But then again, this is a Private Hospital where only the good
surgeons operate in. So make sure this time when you return to NUH
that you INSIST on a good surgeon operating on you, ok?
