Guilt, what happened to me isn't bad enough to warrant having ptsd triggers

I always feel guilty that I get anxious or scared when this topic is brought up or mentioned. My old therapist told me I have PTSD "in a mental way?" whatever that means..
but I feel it's unwarranted. as I wasn't the one who was raped my sister was.

My dad raped my sister when she was 11, I was 10. I have very foggy memories of this. but I remember the drawings she made of it depicting it, I remember her reenacting it on me, pinning me down punching me. she would do this to me over and over.
I remember her trying to kill herself I remember him threatening to kill me. I remember him walking in on me while I was showering. but I wasn't the one who was raped. So I feel like I have nothing to be scared of

My father then proceeded to stalk us for 15 years
now despite living in a different state I'm terrified one day he'll just knock on my door because I still share his last name.

in middle-school I was groped and fondled by one of my female friends, upskirted in public
I was always terrified of sex and for the longest time I hated guys (until I met my current boyfriend)
Same for highschool only this time I started going to parties so those other girls were drunk, and guys started older guys would try to as well. including 2 homeless men who tried to grab me.
I would be in a constant state of feeling unsafe. my mom, since I was 11 years old would tell me and my sister that since we're pretty girls we were inherently unsafe

but I feel like all my panic and anxiety and my ptsd diagnosis has no validation. because I was never actually assaulted.