July 27, 20100 found this helpful
I hate to tell you this, but they could be bedbugs. I just recently heard that they are really bad lately and they aren't just in your bed. Seems they are coming in on clothing from other countries and can live in couches and other places, even though they prefer the seams of beds.
The program I saw showed someone coming into the home to exterminate them by freezing them. They located bugs the size of a pin head on the underside of the boards on the bed. If I were you I would contact an exterminator for their opinion before it gets out of hand. Hopefully they will tell you that's not what you have.