Is brown discharge a sign of pregnancy?

I’m having so much milky white discharge ( no smell) and I never had this much before . Could this be a pregnancy sign also?

I am almost 6 weeks pregnant, and last Wednesday we had Sex, and thursday morning I had a lightish pink-brown discharge. I’ve kept a close eye but today (Sunday) I’ve noticed some brown discharge randomly. Has anyone else has this? This is my second pregnancy!