I am a ftm and felt my first "bubbles" around 15-16 weeks. :) 11 weeks may be a little to early but I wouldnt say impossible.
I felt them@ 11 weeks and when I saw my first ultrasound mh babh was literally hopping! Urs could be doing the same. . I also felt him shift moveaaround w the lil weight of him!
With my first son I started feeling him move at 18 weeks, with my second son I began feeling him kick at 14 weeks, and even stronger at 16 weeks. They say the more pregnancies you have, the earlier you begin to feel it and the earlier and more you show. I've never heard of anyone feeling the baby kick as early as ten or 11 weeks, but I guess you never know? It could be gas too....it feels really similar to the early kicks.
I doubt that you are feeling kicks.....your baby is far too small at that time!
If this is your first pregnancy, its very unlikely those are baby kicks. And you'd feel it like popping not kicks yet.