Quoting Luneth's Mommy(::" I think it may be melasma. When I was 17 I was on birth control, and I got red patches all along my neck ... [snip!] ... it may be melasma, or something else. If it is melasma, I can assure you that it will eventually go away. I hope this helps."
I don't think it's Ring Worm or my doctor probably would have mentioned it.
As for the Melasma, it sounds plausible because I'm pregnant and my doctor did say that it was probably just pregnancy related and from the hormones.
I just feel so gross with it.