I have luckily 0 experience with bedbugs.
And for the ceiling fan, I saw mosquitoes trying hard to go above the fan, from which they then use the currents to land right onto me.
When close enough to the body, they tend to find places to hide from the currents.
That wasn't possible when the fan was at full speed (this particular one is pretty fast and I haven't seen other ceiling fans be as fast in years), but I am now unable to run it at full speed as it ends up smelling like something is burning inside which prompts me to turn it off.