Watery discharge & cramps.

Jahnia
So no one could answer my question before but last night I had a lot of watery discharge that soaked my underwear along with cramps. I've never had it before. So today experienced brownish blood when I wiped and I'm still having a few cramps. I'm only 7dpo and period isn't expected until another week. Anybody else experienced this or know what it could be?? Please respond.