Why would my mom do this?

[JT0519]

my therapist mentioned that I'd been there before back when I was 3 and 6. I told her it was probably because I'd been sexually abused around that time.

I should add that even though I was in therapy, I never felt like I really processed what happened, despite my mom telling me that she took me all the time and it was very extensive. But the records showed that she only took me 6 times in 2 years and had me on Prozac at the age of 6.

I'm just frustrated. Why would she essentially be telling me I should be fine because I've been through intensive therapy? When in fact she barely took me, cancelled appointments, etc.
I keep trying to tell myself that she did take me and maybe I'm wrong about this etc but idk. I've blocked a lot out so maybe I blocked therapy out too.. ?? She has BPD though and has generally always been unreliable tbh..  my mind is ping ponging tonight.