Hello. I recently have seen small purple and red flat spots on my skin that appeared and disappeared, and reappeared in a different place two weeks later. Also, today I got out of my bed and saw about 30 red bumps on the back of my legs, between my legs, and on my foot. They are itchy and resemble mosquito bites. I looked at my bed, lifted the sheets, but no sign of any bugs. What can this be? Please help. Thank you.