Hi, for the last week or so. I've been getting flat circular red blothes on my skin. It started on my chest. But, have now spread to my arms, thighs and legs aswell. They are scaly to touch, non itchy and do not cause any pain. I did have Unprotected sex almost a month ago. But, there's no signs of a STD. Except this rash. Anyone know what it could be?