What going on with my eye?

Last night I noticed I had this blotch on my eye. It's sort of an off yellow color, with red around it. It doesn't hurt but my eye keeps going more blurry then it normally does. I've got the start of glaucoma, and was wondering if this could have to do with it? I freaked out when I thought of that, because you can go blind from it. I no absolutely nothing about how the eye functions, and what not. So I was just wondering what this spot is? It's not just a little speck, it's pretty good size. Should I be worried?