my cousin once got bed bugs from her school too!! it was horrible, spread out to the whole house within a week. my aunt and uncle were going crazy and cost them a lot to find a pest control company for getting rid of those bed bugs. but after pest control, there were some bugs left out too.. not completely done. after that they used Chinchex instead, they said no more bed bugs in days. now they use the powder every month. it is also a very popular product in Asia I heard.