12 Days After Tummy Tuck - Did I Tear My Muscle Repair?

The pain and discomfort is very variable post abdominoplasty. Some patients like yourself are surprisingly very comfortable. It is usually the tissues that fail and not the sutures. If that were to happen at this stage, it would cause bleeding and it would be more painful.

Early out of tummy tuck surgery, the concern with your description would be, the potential for disruption of sutures that are holding the abdominal wall muscles together in the midline.  

In general, it would take a significant amount of pressure to “tear" the muscle repair after tummy tuck surgery. This event would likely be associated with significant discomfort. A change in your physical examination, such as increased swelling, bleeding, a new onset "bulge" would also be likely.

Generally speaking, abdominal wall muscle plication performed during tummy tuck surgery is quite secure; disruption is very unusual. You will be best off following up with your plastic surgeon who will be your best resource when it comes to accurate assessment, advice, and/or meaningful reassurance.

Best wishes.

Its very unlikely you torn anything, the sutures used to tighten the muscle are very strong and ripping through the muscle is very painful, you would know.
I still suggest you mention it to your surgeon since he is the only who knows what technique and what sutures were used.