spotting. could it be a sign of pregnancy?

Ive had spotting for a week. it started tuesday it was light pink. didnt need a panty liner. second day it was brown. only when i wiped. Thursday-Saturday no bleeding. Saturday i had like a mucus like discharge. Sunday i started spotting again. it was pink and a little mucus like discharge with a little red in it. & i started spotting again on Sunday. Barely anything touching the panty liner. has anyone had this & found out they were pregnant?