Hi,
I'm sorry you are having problems related to your tram flap reconstruction.
Unfortunately, complications from tram-flap reconstructions are quite common. If you click on the link below, it will take you to over 140 previous threads on the subject. Many discuss abdominal problems similar to those you mentioned, including hardness, swelling, bulges, and pain. Perhaps some of them will provide information that will help you understand what is going on in your case.
http://www.medhelp.org/forums/search/54?utf8=%26%23x2713%3B&query=tram+flap+reconstruction
I'm glad you have an appointment scheduled with your doctor, and hope s/he will be able to offer some help your difficulties.
Please come back and let us know what you learn--we care!
Best wishes,
bluebutterfly