I'm not the best to ask, but if you are an octave above where you thought, it could be more strain than resonance that you're hearing idk, though it does sound like resonance from how you describe it. It would prob help to hear a sample so people other than me that actually know things could judge. Maybe try dropping the pitch a lil bit and see how that sounds?
I find there is pitch, there is resonance, there is inflection, then there are some super subtle more qualitative aspects that need to be right that I haven't really figured out yet.