I’m not sure quite what prompted it, but I started looking into the interactions between benzodiazepines and REM sleep, it appears that they suppress REM sleep and their withdrawal results in REM sleep rebound. 

It’s interesting more than worrying, I’ve used various types of benzodiazepines over the last few years, never for more than a couple of nights at a time. I do sometimes get crazy dreams, but then of course any changes to brain chemistry can cause that. 

I could probably go to the doctor and explain, but it’s more likely that I won’t.