@Dontknow-17,
You know, I just thought of this because you did not mention if there was explicit sexual contact between you and your niece. If there was, you should be aware that in some states, therapists and counselors are required by law to report any such incidents to the authorities. And, believe me, many therapists and law enforcement people have a tendency to put all such accounts through a multiplier of their own convoluted thinking.
Best advice I can give to you or anyone in this situation is for you (or your parents) to seek legal counsel
first. The power government has to protect is also capable of crushing those who are small.
Of course, this may not apply to you; but perhaps it may serve as good advice to someone else who may read this thread.