Did you speak in an elevated voice regularly pre-op? If so, could it be that you are speaking at a similar pitch now but that it comes out without elevating your voice? Anyways - don't try to hard, let it rest for now. Just a thought - as I understood it, Sarah was using an elevated voice for years before the surgery and basically her pitch shift was not that much but the main benefit was that she now does not have to raise her pitch by using muscles and thinking about it. Compared to the non-trained "natural"/physiological pitch, it is however an elevation. Did you compare your voice now with the untrained version pre-op?