Spotting

Imm scared, this is the second day that i wake up go to do peepee and wiped, and theres a brown discharge, is a light brown, but today is deeper that yesterday, im 7w 3d today :( im just hoping this is normal, i dont have any pain down there nor in my ab. Just a discomfort in my tailbone when i walk, and today is my birthday :'( (this is my first pregnancy ever) im really scared. Who did expirience it?