How to get rid of bedbugs?

They are probably in your mattress unfortunately. Boric acid powder will kill most bugs of this sort but it isn't safe if there are small children or pets around. To use it on your bed would be unwise as you would be breathing it. You can try it in dark corners where they might crawl but the source of the infestation has to be solved or they will hang around indefinitely. Hotels often have these pests. They live on blood.