Sound like bed bugs unfortunately. I'd get a professional in ASAP since otherwise they merely spread around your house and residences and work places of others you are in contact with.I have never seen these teeny tiny maybe baby ants. I was sitting on my bed putting a fresh pillowcase on my pillow when I noticed the tiniest bugs on my white mattress cover...now I am freaked out to even sleep in my bed. I cannot figure out where they came from. I tried to squish them one by one but I just kept finding more and more. Finally I took all my bedding and put it in a garbage bag coated with diatomaceous earth and then sealed the bag as airtight as possible. Ugh!