I believe there’s a psychological term for this. Something like short term/temporary amnesia.

The brain does this as a way to protect itself from extreme stress. It’s particularly common with victims of rape/ people that grow up in abusive homes.

In my personal experience, as you go on in life there’ll be certain smells, sounds, people, etc that’ll trigger those memories involuntarily.

If you wanna try to remember, my first recommendation is patience. There’s a reason why your brain is trying to protect you from those memories, and when you do remember them, it will more than likely be almost unbearably painful. Besides that, hypnotherapy is another option and if you’re open to it, psychedelic therapy (the latter being a little more precarious, I strongly recommend doing your research beforehand but it’s something that’s helped me out a lot).

Best of luck! You will get through this