Well with me it's always the coffee that kicks things into motion as it were
Caffeine gets the muscles in your colon moving so helps move things along IF there is stuff in there and no blockage. But if theres nothing there or there IS a blockage it could make things worse, so if the doctor told you NOT to take it then do what they say - especially as you say you had cramps?
If youve not been eating 'normally' since Wed it might just be that theres nothing much in there! I had this problem when I was in hospital, I was laid up for weeks after a road accident and eating hardly anything, so there was literally nothing there to come out!
Once you start eating again things will start moving along, but you might find that whatever the last bits of food were that went in have kind of got 'stalled' along the way, and as other stuff comes up behind it it gets like a traffic jam and kind of compacts into a bigger, harder, er 'lump' than usual, so it can sometimes be a bit hard to pass at the other end as the er 'hole' isn't big enough
But they can sort that out and usually it becomes a bit more obvious that there *is something* that *wants* to come out... If it feels like theres nothing that's particularly fancying getting out urgently I wouldn't worry too much
Just pop in to your GP Monday and let them know whats going on.