I lifted a carry on bag while traveling after 5 days post breast augmentation op, should I worry about it?

Hello I always recommend to my patients that after a mammoplasty they must be in full rest so that there are no complications, I suggest that you consult with your surgeon and perform a sonomamografia paa to verify that everything goes in order.Always To serve you, Dr. Manuel Ventura Certified. Medical research institute of plastic surgery in sao bernardo do campo, sao paulo, brazil

For my patients, I advise that stinging sensations, even if just on one side, are usually related to transection of nerves during surgery. This almost always goes away over time. In the early post-operative period, the things that I am most concerned with are asymmetric swelling (possibly representing hematoma) or signs possibly associated with infection such as fever, redness, localized pain, and problems with the incision. 
For specific symptoms related to your surgery, it's always best to call your surgeon and ask. They won't mind. They want you to be happy and healthy!

Based on your history is unlikely that you damaged anything.  However I suggested to contact your plastic surgeon to inform themof what has happened.

It is always best to contact your surgeon with any questions or concerns post op.  Let him or her know about the lifting and pain.