clear, watery discharge before AF?

Does anyone else get clear, watery discharge before AF? AF was due today, but could still come tomorrow. She's known to switch up her days, but ALWAYS shows up Tuesday, Wednesday, or Thursday. I have never had discharge like this before a period. I really don't think its ovulation. I've had positive OPKs twice this cycle, July 25 and Aug. 7.

For years I have always had dry/tacky/thick discharge or creamy/white discharge before AF arrived. minimal cramping. This cycle, all I am getting is a whole lot of clear and watery. I feel like I am peeing my pants.(I can reassure you, I am not.) Any thoughts?