More discharge?

AF is suppose to start today. We did BD day before ovulation so hoping. I’m on a pretty regular schedule, but past 2 days I keep thinking I’m starting only to wipe and see a bunch of clear discharge. However, this morning one time there were small shades of brownish color in it too? So could be start of AF, but anyone ever get more discharge at beg of pregnancy or still some discoloring when period should have started? I just don’t remember having this much before discharge before my period so curious.