Smooth Red Circular Blotches On My Body -help!!!

Ok this is really freaking me out. Ive never had any health problems per say , alwasy been a healthy kid. Im 21 years old and in the past couple weeks ive developed these red circular blotches on my stomach then a few here and there on my chest and a large patch on my back. And every day I seem to notice another circular spot appear. They are not all bunched together, but a a few will be bunched together here and there and the large gathering on my back. The spots are smooth and do not itch and proabbaly less than a 1/4 inch in diameter for most of them. Its really scaring me I have no idea what these could be. I tried changing laundry detergent , washed everything that touches me just a day or too ago but other than an allergic reaction to the detertgent, I have no idea what to think. Someone please help me. Im scared to go to the doc. But in know I probably should.