One of my friends used FOGGER available at Walmart once and got rid of bedbugs. I read a lot about bedbugs and seem like we need to apply chemicals in a cycle of 3 months to cut its  life cycle. Try it once and see how it works. Looks like u can order it online in amazon. Best of luck!! sleep tight n dont let the bedbugs bite.
follow this weblink
http://www.amazon.com/Bonide-685-Flea-Fogger/dp/B000BWZ9EY