strange non itchy rash that spreads

I have a strange non itchy rash that is now spreading all over me. it started just one behind my leg and i thought it was just a broken blood vessel. as the weeks have gone by i have noticed it is getting much worse it has spread all over both legs and is now on my arms. again it does not itch, it is not raised off of the skin, its kinda circular for the most part it ranges from anywhere from red, brownish red and pink. I am really scared of what this could be, I have no medical insurance and have tried to figure it out for myself but nothing online really matches. Do you know what this could be?