How can i deal with being psychic?

My mom thinks im crazy, but my grandmother says im fine. For as long as i can remember i have always been a dreamer. But one day when i was about 6 i began seeing things! I told my mom about the strange people and things ive been seeing and she told me im crazy! When i told my grandmother about it she was overjoyed. Ever since that day ive been hidding my powers the best i could from my mom. However she still finds out when something weird goes on. Then she'll call me weird and ask me to call my grandmother. It breaks my heart to see her scared of me. I dont know what to do! HELP!