The same thing happened to me I saw spots and colors I had to get out the shower because my head started to hurt and I felt weak as if I was going to faint. When I got out I was stumbling to my room to lie down. After I did I felt better. I just found out I failed the glucose test and have to take the three hour one Friday. Don't know if that's what had to do with it or the fact I'm anemic and have low iron as well.. Who knows