background info : im 17f &amp; diagnosed w anxiety, have a possible diagnosis for ADHD, and a diagnosis in progress that my psych stated as "anxiety with a severe depressive disorder with heavy bpd symptoms"

I am obviously not mentally put together very well but for the past year or so I have been having weird episodes where I seem to have extremely strong symptoms of a specific mental illness that lasts anywhere from weeks to months, before completely stopping and switching to a new disorder. It started with me already having depression/anxiety and them getting really strong ADHD symptoms, then really strong mood swings &amp; mania (like heavy bipolar vibes?), then heavy borderline personality symptoms (as mentioned in my diagnosis) , and now it's very strong ocd symptoms (contamination type). 

Is this a mental disorder or a symptom of anything specific? I really don't think I'm just making it up, because I can't control any of it. Does anyone know what might be going on?