I feel some small air bubbles traveling right underneath my skin where I had my tummy Tuck. Is this normal?

I am sorry to hear about the concerns you have, especially that you do not feel comfortable with the follow-up care that you are receiving. Unfortunately, nothing will replace clinical evaluation when it comes to determining whether a specific finding is “normal” (most probable  temporary air under the abdominal wall flap) of (rarely) a sign of a serious complication. Therefore, despite best efforts, online consultants will not be able to be truly helpful. Ask for an additional follow up visit ( earlier than already scheduled, if necessary) with your plastic surgeon and  address your concerns. Best wishes.

Sensation is altered after a
tummy tuck and takes quite a while for it to return to normal, many times up to
3 months. There are always strange sensations because of the drain, the muscle
tightening and the other procedures, but they usually resolve slowly with time.
It may represent bubbles as you described, but it may simply be an altered
sensation that will improve with time. At this point I believe this is without
normal limits, particularly if there is no redness or fever, but if those
things occur you should consult your doctor.