There are many bed bug look-alikes, including carpet beetles, spider beetles, roach nymphs, and bat bugs. Bed bugs typically hide during the day and are active from nightfall until an hour or two before dawn, clustering near a food source (i.e., you). To spot them you can grab a strong flashlight and look for bugs, eggs, and cast skins in cracks, crevices, nail or screw holes, furniture joints, seams, and under any mattress tags, as well as on the bed frame and baseboards near your bed.
There’s nothing distinctive about a bed bug bite, so neither bite marks nor red or light-brown blood stains on your bedding are proof you have them. Look for their characteristic brown-black, dot-like fecal stains (digested blood) on your bedding, mattresses, box springs, or baseboards. If you have bed bugs, you will find some visible evidence. Bed bugs, from eggs to adults, are visible with the naked eye. They are not microscopic, they do not fly, and they do not spontaneously generate.