i'm totally new and worried...

um,no one will beleive me but

i sometimes dream things then they happen but not necesserily on the next day or week or month but it happens...like i control wat happens next it may sound (unreal,it's not a lie)awesome but it;s terrifying i keep seeing my little bro hoo i adore getting hit by a car it's scaring and depressing a lot and the depression is affecting my life,my popularity has increased a lot,because i'm pretending to be all cheerfull and stuff other than depressed!!i'm REALLY WORRIED CAN ANYONE HELP????