CHLOASMA???? or Rash? Help me ladies?

I woke up this morning and went to the bathroom, when i looked in the mirror i noticed i had like a mask sort of thing across my nose from one cheek bone to the other{picture the lone star dude's mask}. I looked this up and saw that it was called chloasma or melasma meaning the mask of pregnancy. Earlier this month i had few pregnancy symptoms, and changes in my body but aside from those now this mask comes across my face. Its not darker than my skin but you can visually see this on my face. Could i be pregnant|||Yes, it could be pregnancy. Maybe you should go get a urine pregnancy test. If its negative, there could be hundreds of other reasons why your skin tone changed.