There is too little information to know exactly what is behind these memories. It may be that they keep getting replayed because they were so unusual, they may be fragments of a larger memory, or they could be islands of memory where other information around it was suppressed or repressed.
The fact that they are persistent is important. I will encourage you to use the Find Help tab at the top of the page to find a therapist in your area that you can go to to sort this out. If you believe these memories are connected to your abuse, then interview therapists who have experience in childhood trauma to find someone you feel comfortable with.