This. I got bedbugs at a shitty old apartment I rented in uni. Nothing besides fire will kill these things. I put one in a cup full of diatomaceous earth and he was still walking around happy as a clam 2+ weeks later.
All clothes should be double bagged in black trash bags (10+ mil) and set out in the sun to cook while you put EVERYTHING fabric through the dryer for 1+ hour. Don't stuff it full or the eggs will survive. Oh, I might've forgot to mention the eggs are EVERYWHERE. On your skin, on every piece of clothing you own, on every towel and bedding item, every pillow. Everything fabric must be steamed at 140+F for over an hour to kill them.
Every piece of furniture you own goes in the dumpster, immediately. Your couch, your chairs, your table, your bed, your bed frame. Everything.
While you are waiting to move out by activating the bedbug clause in your renter's agreement (oh god help you if you didn't sign a bedbug clause you poor fucking bastard) you will sleep in your car.
When you get to a new place you will have to buy new furniture. Additionally, from now on, inspect new apartments very thoroughly for bedbugs. Pull up the carpet in the bedrooms and make sure you ask about any previous infestations. Apartments ARE required by law to tell you although many will try to hide it.
Poison doesn't kill bedbugs. If anything, it pisses them off. No pest control company that uses poison will work. The apartment will send a maintenance team in with some shitty cans of RAID and then tell you the problem is fixed. It isn't. If you find bedbugs, your options are to move, or deal with it, because no apartment company will spend the $10,000+ required for an actual heat treatment which actually works against bedbugs.
It's really shitty, but this is what you have to do. Toss everything or they'll keep coming back again and again. Since you don't have a bedbug proof mattress bag, when you buy your next mattress be sure to pick one up.