period

My period is late by 40 days. I've always had a late period, however last week when I wiped I saw pink like discharge. I thought my period was about to start, but the next day it returned to my normal discharge color. I read that pinkish discharge mean implantation. & I got kind of scared because the last time I had sex was April 15. My period was suppose to start yesterday, but instead of getting my period, I'm getting a dark brownish discharge, but when I wipe it's a dark red. Does this mean my period is about to start? Or could I be pregnant? 😩