A week ago I found a few bed bugs, so the exterminator came to my house and told me the infestation was very small and that I don't need professional help. He told us what to do to get rid of them so I did everything. Today was the first day my room was completely put back together and I was laying in bed and I found a very small bed bug crawling around on my sheet. Should I be worried? I cleaned all clutter and washed everything in hot water and high heat. I vacuumed, sprayed my mattress and bed frame, put bed bug sheets on the mattress and what the mattress sits in, and put this powder that is supposed to kill bed bugs in the crevices between my carpet and wall. Should I do it all again just because I found one or what?