you can have a try on Chinchex insecticide powder. its cheap and works!
Apply to bed frames, mattresses, walls, sockets, and furniture..any areas suspected to have bed bugs, thin layer of the powder is enough. Chinchex is made by natural ingredients, its safe for human and pets, so no need to worry. you can see the result in 2 weeks time, it also works for cockroaches and ants too.
you can order from w w w.amazon.sg/Chinchex-Bed-bugs-Insecticide/dp/B082TVPHPG/ref=sr_1_1?keywords=chinchex&qid=1579660063&s=gate way&sr=8-1 or chinchex.sg