Luckily a lifetime ago I was a licensed exterminator and got it sorted. Treating for bed bugs is not fun, though, and part of the reason I got out of the pest control game. It involves either laboriously treating with chemicals in hard to reach places or wearing a tin foil suit and literally blasting your bedroom with heat to get it to 140°F (60C) or so to kill all of the bedbugs.
It’s been a few years and I’ve never seen another one, but definitely felt like I dodged a bullet.