@Jonah ************
you will need to fill out the form for extension (I think it's called TM7), have your TM-30, copies of passport stamp, picture page, etc. and 1900 baht. Since your current exemption runs out on December 26th, you should be within the window to extend. Just go to your nearest immigration office this week.
Da Nang has a GREAT vegan food scene, not sure about the queer part though.