It is not uncommon for a student to need more than one semester to complete the thesis. You will merely enroll in another section of 799 for the following semester, but for only one credit hour. Complete the thesis and submit it. Your director and readers must have signed off sufficiently before that semester's deadline so that you can circulate the final product to the Director of Writing Programs and the Department Chair for signatures. Follow up professionally .
Many theses are of near-publication quality, and some have been published.
You'll probably be exhausted by the time you finish your thesis, but promise yourself that you will pursue publication of at least a portion of your thesis.