Dellusions?

As I am new to this forum and very confused about the event I'm about to describe, it might not be the right forum. Deepest apologies if it isn't.

About a month ago, I experienced an anxiety attack, and as usual curled myself in bed so I won't harm myself. After some time in bed, I was sure at some point someone was standing next to me and saying my thoughts out loud, instead of hearing them in my head. Afterwards, I was convinced that the last three years didn't happen. I was sure I imagined the relationship with my partner, and the therapist who's helping me out a ton, and the fact that my life had gotten better in many ways.

I woke up the next day, and I was sure until recently it was just a wild dream. However, it occurred twice recently since than (once when I was sitting in front of the computer with the lights on).

I don't think it ever happened to me before. It's hard to know though, since I just recently started remembering my childhood, and there are a lot of "holes" still in my memory.

Currently I'm officially diagnosed with BPD, general anxiety, depression and ptsd. I'm on meds, though I'm taking them for some time and it doesn't seem to be related.

Can someone help me understand what was I experiencing? I'm terrified of telling anyone about it (including my therapist) and it has been bothering me a lot..

Thanks to anyone who's willing to help
p.s: Please excuse any faults with my English, It's not my first language