I've been getting unknown bites on my ankles for about 2 months. They appear in clusters or a line of several (often more than 3 in a single line). I recently found a bug on myself early in the morning after walking to the restroom. I've included pictures of the bug. At first, i assumed it was fleas, but both of my dogs were tested and no fleas were identified. I am fearing bed bugs, but I have turned my mattress inside out and see no signs. The bug did not appear to be a bed bug, but I'd like a professional opinion. Keep in mind, these photos were taken after I unsuccessfully tried to crush the bug. It was impossible to crush. Hopefully I didn't distort the appearance.