what is the point of having so many diagnoses? i’m so confused

according to my psych, i have depression, anxiety, adhd, ocd, and autism (along with a history of an eating disorder). it makes me stressed and confused as to how this is even possible? like it feels like i’m faking it and hes just picking a random diagnosis that sort of aligns with things i experience. i know hes a professional, but it’s like personally i feel like a fraud, and embarrassed of my mental disorders he believes i have.

I can’t tell anyone (like my family or people close to me) about this, bc it sounds like i’m just collecting diagnoses and throwing a pity party for myself. Like how can someone even have this many diagnoses? it sounds contradictory or something.

this isn’t shaming anyone that also had similar/the same amount of diagnoses as me, it’s just a personal thing i’m dealing with for myself. i just feel a lot of shame and embarrassment surrounding it