Am I developing a psychotic condition?

I'm 14 years old, and I don't feel like I'm living like a normal 14 year old. I worry too much about things.... I put tape over my computer camera so no one can watch me, I poke holes in my window screen so it will be easy for me to escape from catastrophe and I even dial 911 if I THINK something bad will happen. Sometimes my mind confuses me, sometimes I talk and don't make sense. I always feel like someones watching me... Sometimes I have compulsions to say mean or rude things out loud but so far I've been able to control myself. I even have conversations in my head sometimes, usually about vulgar things like killing someone... I fantasies about murdering people or even killing myself... I'm already on anti-depressant but I'm afraid when I'm older my condition will grow into a psychosis if it's not already at that peak.