I discovered I had bb issue in my bedroom around a month ago, after that I did a thorough DIY treatment, found 2 mature bedbugs and 3~4 immature ones on my bed and a immature one on the wall, killed them all and had bed isolated. After the first treatment, I found a live bb on my desk and a dead body, besides that I didn't get any bites for 3 weeks,. Then I got bites again! Found 3 immature bugs on the encasement, including the ones just bit me, they are probably hatched from eggs on the beddings, so I trashed all beddings and checked encasement, making sure there is no nymph left. It has been a week after that, I check bed and room daily, didn't see any bugs or got any bites, so I guess the situation is getting better.
But after reading this forum, I start to worry that bb might spread to other rooms of the house, I have a roommate, she didn't get any bites and cannot find any sign of bedbug in her room, is it possible that some bedbugs, despite having not get any blood feed for a month, will start to crawl into other rooms in the future?