I would never use Rohypnol or any other benzo for sleeping, as there could indeed be some problems on withdrawal. In future, once clear of the Rohypnol, either stay entirely natural and avoid sleeping meds, or if they ever become temporarily useful, use only the more modern NON-benzo versions like Stilnox
Otherwise, it sounds as though you're managing well. I raise my own glass of water to you --- Cheers !