I've experienced living with bed bugs during my boarding school years. Despite getting multiple bug bites a week consistently for a couple years, I never actually got to see a live bed bug.
Bed bugs are no joke
Bed bugs are no joke
https://duckduckgo.com/?q=bed+bug+bite+picture&t=iphone&iax=...
Note that some people attract bed bugs, and some people don’t. One time, I woke up with 40+ bites, and my wife with none. She has never been bit in her whole life, and I have been bit on at least 7 or 8 different occasions during my travels.
If you never saw any evidence at all then it’s more likely scabies.