Drinking water - to the point of forcing it down - is essential after surgery.
It flushes out random bits after surgery.
Leaking - normal, but it varies.

My incontinence was just awful. Others are great at controlling their pelvic floor muscles & don't have as many problems. Don't let the leaking put you off drinking water. You really need it.
And you got through the surgery & on the way to recovery.
So you're already winning.