spotting in early pregnancy

Erin
I am roughly 6/7 weeks pregnant. Will find out tomorrow at my first ultrasound... anywho I noticed today when I used the bathroom that I was spotting. It was a light pink color and since has been brown. I'm really nervous it could turn red and things will go south. I am anxious for tomorrow's appointment for some reassurance. Has anyone else had spotting and everything be ok?