Ditto what Christine said. I totally understand that money is important but oral cancer can be very aggressive. What seems to be nothing can quickly turn into something bad. Your having had superficial SCC tells me that you need to stay on top of it. Otherwise what was superficial could easily become invasive and if not detected until too late will require not only surgery but chemoradiation and even then may not be stopped. I am sure a biopsy and the drs bills are expensive but the rest could be not only far more expensive but also cost you your life. The excisional area that was removed in 2012 may have been grafted inside your mouth or could very well have become a tumor. I don't want to scare you - though the term cancer is scary to begin with, but this should be looked at ASAP. best of luck and let us know what happens.