Rob, I am not going to say you didn't see or you did see someone you think was Mary.
All I know is what the Bible says "quoting Jesus's words. no one comes to me except the Father draws them" .
Remember satan also is a spirit, he can change his appearance to whatever he like even a beautiful angel.
I know your doubts. Don't be afraid. The relationship I have with God, by His Grace is working, His Good Work....I have perfect peace.