My first thought is that the difference between level 3 and level 5 is almost inisgnificant, at least at this stage of the game. Yeah, it will be inconvenient, but I'd probably go back to that save. Just think how much more quickly you'll be able to go through it.
Of course, you can also reset adventures, which will put things to rights. Only this time, call out Ukabu as soon as you can, and don't dilly dally. And remember Mama Hissy's mantra, shown below in my sig...
