How do you know for sure if your an indigo child?

I am very insightful, (my friends and mother say so too), and I feel like everyone has a purpose on the earth that they have to discover and fulfill during this life just like the other indigo children are saying. A lot of the time I find if I shut myself out that ideas and insights about life and what humans really are and need to be come to me and i feel sometimes feel like I'm supposed to change the world(like everyone else) and I do have many ideas on how to do it(they are not violent or harmful in any way. I have been reading about indigo children and I would consider myself one, except that I can't see spirits and I don't rember any past lives or the time between. But I can feel what other people feel and know what they are thinking in a way. If you are an indigo child is it just something you know and feel or do you find out?