Ah, I didn't realise you were post op as the badge in your postbit says "pre-op" . . .how long ago was your surgery? Anaesthetic can leave its effect for a good few days, rest, take it easy and don't push yourself to do things . . .
If you have a weeping port site, you need to speak to your provider because it could be infected and need some attention - certainly don't leave it. Also you can mention that you've not had a bowel movement since saturday and they can give you something, but don't leave that either because it can be painful - senokat, dulcoease, lactulose, any of those you can get over the counter . . .
With regards to liquids, don't push what you can have, little and often is often the best way to go. In my days post op, I couldn't get anything "milk" down as it made me feel bloated so I went back to clear fluids only for 4-5 days and then reintroduced it slowly. Keeping hydrated is the important thing . . .