I had a psychedelic experience during my retreat. Is that common?

My Vipassana experience was wonderful but at the same time too intense. On day 2 I was starting to have anxiety attacks randomly. On day 6, while trying to sleep, I couldn’t stop seeing those colorful images you see in rave art or that are associated with LSD. I was also having kind of a persecutory experience - everything I looked reminded me of monsters. Like when you see pictures in clouds, I was seeing monsters everywhere. I then decided to quit on day 7. I was afraid of having a psychotic outbreak.

I was wondering if this is common. I saw people mentioning they experience memories of childhood traumas during meditation, but for me it felt like I was having drugs instead.

Does this happen often?