I had a bed BUG, singular, in late August. I was waking up with the classic 3 bites in a row. Had 'em on my hand, knees, and back. They itched so much and were so big that I eventually realized I was not dealing with a mosquito. I immediately took everything in my room (sheets, blanket, clothes, my entire closet as well) and threw 'em in the dryer for 30 minutes, while wrapping my bed in a plastic sheet to contain the bugs somehow. While inspecting my bed after, I found a bug, killed it, and wrapped in scotch tape for proof. I kept checking my bed but never spotted another bug, which was weird.
I called my management company, and wow, they were awful. They gave me the run around for weeks, forcing me to stay on my couch. Luckily, I received no more bites and my old ones went away. Eventually I learned my upstairs neighbor had a bed bug infestation before I even got bitten. She also called the mangement company and they also ignored her, resulting in things getting so bad in her place that it spread to my apartment!
Finally, the management company arranged for the exterminator to come 2 1/2 weeks after I originally called. I had to take everything and put it through the dryer again and keep it in bags. After a thorough inspection and spraying, I was informed the bug I killed was the only bug! The woman upstairs had it bad: she had to toss her couch and mattress. She was sleeping on her bathroom floor. It's a common thing for one or two to wander from an infested apartment.
The paranoia and stress during this experience was insane. I was a shell of a man for 2 1/2 weeks. Now with my mattress cover, box spring cover, and pillow covers, I'm $200 poorer but sleeping soundly.