not losing?
Wow - 78 lbs is awesome, and from what I hear, it's normal to plateau at certain points. I've read that if you plateau, you should ensure that you are getting enough protein and drinking enough water.
That being said, I haven't even had surgery yet. Have you tried posting this question on the main board or the VSG board? To get there, just hover your mouse over "forums" at the top of this page - the main board is first and the VSG board is a few spots below it.
Good luck!