Its 7pm here where I am. I didnt have much pain when I sipped, more like discomfort. But, I did have pain if I sipped too fast behind one another, oh yeah, I definitely felt pain..it was bad. So just take it slow, your tummy is swollen & inflamed & very sensitive. So take small sips out of those one ounce cups, if it takes you 5-10mins to do so, then do that..don't force it, slowly sip every 15minutes. Try to get up & move around as much as u can, dont over do it but to help get those gas pains moving around & out of you & to keep from setting up blood clots. I know its painful, trust me I know, once I got home, 5 days later I was rushed back to the ER for severe pain, thought I had a Leak, thank GOD it wasn't! I just did too much..so please dont push yourself like I did bc I can be dangerous & very painful. My daughter eventually stayed with me to help me up & down until I was able to do it all on my own without any pain. You have to find what works best for you! Stick with it, follow your surgeon's plans & orders as well as your nutritionist & stay sipping for hydration..you'll be just fine! ?