It's noticeable when my digestion is off, too.
I'm feeling most movement fairly low, between my pubic bone and the mid-point to my belly button but some kicks super high, right at my belly button. I like to imagine he's doing head stands :-)
I hope your u/s went well and you got good news! Let us know, please!
Thanks for asking!! The u/s went better that imagined. It was blessedly short. We didn't see anything we didn't want to see (although my husband claims he "might have seen a penis" right around when she was measuring my cervix LOL). Baby is measuring fine and all the organs look "normal." I DON'T HAVE PREVIA! Yay. Even though I know it probably would have resolved, I just didn't want that worry. They did 3D at the end for a second and baby is CUTE. Looks exactly like my other two....features are a little closer to my daughter's, with the head shape of my son's. I think all ultrasound pictures look like boys though!
And I felt my first belly-button area kicks today, too!