Can anyone help me with these bed bugs?

The bed bugs and their biting (and my itching) are waking me up every so many hours at night. I dred going to sleep and I can't stay sleep for very long. I know this an epidemic right now, but does anyone know how i can kill them or at least reduce them, or stop them from biting me? The (bed bug) spray seems to only be a temporary fix. P.S. I can't afford professional exterminators.