could i be autistic?

hello,
i am rainbow_fishB and i have been diagnosed with psychosis sort of. They are not sure if it is actually psychosis as i confuse people and find it hard to talk to people. But my mum always thought i was autistic before that, and i have read that autism is common in people with psychosis.
Right now i am completely mute because my voices will not let me talk, but when i can talk, often i dont, i just make noises. I struggle to understand others. I cant really express how i feel all the time in ways others can understand. I get very frustrated if things ore out of routine, and i can easily get upset by short conversations when people dont understand me or i dont understand them and when this happens i know i act quite childishly. I need to be in routine, people make me nervous, i like being alone, i find others irritating. When i was little i enjoyed playing pretend games but only on my own, i hated others joining in. I get very caught up in little things and dont pay much attention. I feel overwhelmed by lots of ordinary everyday things. I cant really explain it, sorry, but does this sound like autism or aspergers?
By the way, i am fifteen years old.
Thankyou for any replies,
Rainbow_fishB