A lot of pressure and some cramping.

I'm 4 days late. Tested this morning and it was negative. Last month I was 11 days late and AF came. I've been testing since my missed period and have been getting bfn. I've also been cramping a little on and off for a couple weeks but today I feel a lot of pressure near my abdomen maybe uterus and a lot of odorless watery discharge. Is there a chance that maybe I'm ovulating this late or could it be an infection of some sort. I've never felt like this before just wondering if anybody else has felt this.