Need advice on new health anxiety theme

Hi everyone. I'm a 16 year old F and I've recently had an OCD diagnosis along with severe anxiety. I'm going to be dumping alot here sorry. I've had health anxiety for as long as I can remember but since September it's become quite obsessive and usually takes the form of me being obsessed I have a certain condition for a month or two months only for it to fade or somthing else to replace it . I'm doing this post because I'm finding the side effects of a particular theme really distressing and it makes me feel like I'm going crazy . Since February 4th I've been completely obsessed ( and terrified ) with the idea that I'm developing schizophrenia. It's been alot but I spoke to a psychiatric nurse 2 weeks ago who told me that it was just anxiety and ocd . Well since then I've been having random memories, things people have said to me , songs and images playing in my head . It usually comes in the form of I'll be thinking about somthing and then suddenly a word will pop into my head , or somthing my mum said to me yesterday, or a song . It feels like my audio memories are leaking into my conscious and to be honest I'm scare . It's usually somthing that they've said to me in the last 24 hours that's completely random but last night a memories replayed of my freind telling me to " do it" which was probably the most terrifying thing I've ever experienced. I've be getting enough but very light sleep and have been dealing with some hypnogogic hallucinations. If anyone else has experienced this specific fear please please say