You've had loads of replies, but I wanted to add my recent experience, incase it helps you.
We had bed bugs earlier this year. Worked out that my partner must have brought them back after staying in holiday accommodation whilst visiting his family - that was the only place either of us had been, because of lockdown.
Found a random bug on the wall one day and squashed it - and was full of blood. Did a bit of investigation on the internet, and eventually moved the (divan) bed - underneath was pile of bed bug skins/exoskeletons and some of them moving around by the skirting board - they like the dark
.
Called a pest control company, they said yes it sounds like bed bugs and recommended that we put all clothes and fabrics in black bags, tie them up until ready to wash @ high temperature.
Divan bed was moved out of the house immediately and the pest sprayer came in, did the bedrooms (edges of carpet and in wardrobes) and came back some time later (can't remember exactly - 3-ish weeks) to re-spray.
In the meantime, we washed EVERYTHING, steamed things that couldn't be washed and even froze something small items (like my sentimental soft toys etc). Any large/difficult items went to the dry cleaner.
The divan bed mattress/base was full of bugs, so that got broken up and disposed of, after being left some time in the garage. We also put a couple of rugs and a bean bag type thing into the garage, where they are still languishing.
We also got "bed bug mattress covers" from a company on Ebay - which is basically a cover that zips up all around the mattress, like a jacket - theoretically stopping the bugs from getting in. Also got some little traps that sit under the beg legs - again, theoretically to stop the bugs from climbing up.
It was pretty stressful, but fingers crossed, we haven't seen the bugs since!