@Klaus *******
you entered on a single entry Non-O visa, were stamped in for 90 days when you got here and that visa was stamped USED.
Getting a re-entry permit isn't gonna add any more time to that original 90 days you got stamped in for.
You either leave the country before that 90 day stamp runs out OR you apply for a year extension by meeting the proof of funds and turning in the documents required at your immigration office. That's the two choices you have