They feel differently sometimes to different people. Visceral pain tends to "refer", or be felt in other parts of the belly and/or back. In my case, I had a complete obstruction right after surgery... I had severe crampy, diffuse abdominal pain, worse around my belly button. I had SEVERE middle/lower back pain with it.
Two weeks later, after the original bowel obstruction had been repaired, I had a partial obstruction. It felt exactly the same as the complete. The only difference is that it resolved with pain meds and forcing fluids. Since that time, I've been completely fine.
Monitor your pain and your bowel habits and gas patterns closely. If the pain gets worse, and you continue to notice that you're not passing gas, call your surgeon immediately and get to the ER. There are several people on this board that have some horror stories to share... take them seriously. If it IS an obstruction, you can die from it... I almost did.
Another thing to consider is a hernia. If you strained hard enough, you might have given yourself a little one.
Edited for clarification of medical term.
Forever cheerful in the face of rueful odds....