I HAVE BED BUGS!!!!

hey first time ever getting bed bugs I found one on my couch that I just got about a month ago off marketplace. I havent felt any bugs or noticed bites my wife had a couple bites a few days after getting the couch but it went away. I squished the bug, vacuumed the couch seams and steam cleaned the seams and was gonna wrap it for 8 weeks. but also dont know if i saw anything else that points to them besides the one I found and the bites from a month ago. maybe theyre somewhere else but I just dont know. does anyone have any recommendations or does my plan sound like it would work.