You can try regrafting, use some duct tape and the works, it might work although slim chances. If you have Clonex you could root it, but keep in mind they should start flowering any time now. I know it's tough and feels like shit, but it happens. I've broken quite a few, some turned well some not. Had to learn to accept and forgive my mistakes and concentrate on the plant at hand. Is where the true potential lies....