My Life Of Unexplained Experiences

I have been experiencing things that others would call nonsense. I'm 13 years old and ever sense birth I've felt like I was... In a way different from normal girls. When I was 7 years old my sister and I witnessed a Spirit or ghost of some kind in our burnt down house up in Nevada, it didn't burn down until a year later though. The thing that scared me the most was when I asked my sister what it looked like to her and where she saw it, she said that she saw a black shady figure in the shadows of her room as she was about to go to sleep. But the thing is, is that what I saw wasn't a shady figure in the shadows it looked like a person but an almost translucent person, All I could make out at the time was that it was a female. Its been 5 years and I've already been suffering from depression for stupid reasons and I managed to forget about what happened but just recently in the last 4 months I saw her again,... She appeared in my life once again right when my pawpaw died. I thought at that point that I went insane my mother even made me go to a therapist and even psychiatrist. I see her in my house at certain time of the night, I have gotten to where I'm scared to get out of my room around 11pm-4am. I don't see her every day but once every so often. My sister already moved out so I can't ask her about it plus she might just think I'm crazy and push me even more out of her life. Am I crazy? Or am I actually seeing her? I know many people experience different experiences but is it possible that maybe everyone has a different way of seeing things?