What’s wrong with me?

Hello everyone! I'm new here, and I need some help, I’ve never actually been diagnosed with anything but I’ve been to several psychiatrists and one of them has prescribed me some pills which are labeled to be used for schizophrenia, although I used to get episodes which are described as “psychotic” and had many symptoms of psychosis, i really want to know what happened to me 2 years ago, i was super paranoid and delusional and i kept hallucinating, I didn’t know I was until my family noticed that I’ve been acting abnormal, I’ve had many delusions which made me lose a lot of friends. I never knew how to explain it to them because I was never diagnosed, I am still a young teenager trying to figure out why this happened to me. I was completely normal my whole life until I started acting weirdly for a few weeks, so can anyone help me figure out what this is? My psychiatrist says it’s just stress, and it hasn’t happened since I started taking the meds, but I am always scared that these symptoms will come back :(