Glad I Am A Bandster

I am 6 days post op and I am really starting to feel better,especially now that I have found this site. I am still on my clear liquid diet untill friday and then I can go to full liquids. I have a question though that maybe someone could help me with. Once I start drinking something it feels like I am having a contraction and it feels like things are tighten up in my belly. Does anyone know what this feeling is that I am experiencing? And is it normal? I was thinking that maybe it's me getting full. And thats the way its telling me to stop. And my other question is that I have the items listed that I can have on a full liquid diet but can you please give me some advice on what you have eaten and different ways or types of smoothies that will help me though this next week. Look forward to hearing from you guys.