My LCD is bleeding purple, it started this morning, how long?

My LCD started bleeding purple this morning after a drop, there was already a minor crack in the screen and the purple is now bleeding into black from the initial dropped corner, I can still use the screen and can still see most of it for the time being, minus a huge black spot and two big purple lines going vertically up the screen. I know I will have to get it repaired but I am traveling this evening and need to know roughly how long the phone will last, i.e. will it take a few hours to totally cover the screen or will it take longer? I know it’s hard to say with these things but I’m just looking for other people’s experiences as I will be needing it, don’t have a spare and will not be able to get it fixed until tomorrow at the earliest? Not that I think there will be, but if there is anything I can do to slow the bleeding down that would be helpful too!