Period due 3 in 3 days but dark line on ovulation strip

I need help, I am due on in 3 days (Saturday) I have been bloated to the point I look pregnant, my back is aching and I have a sharp pulling tugging pain on my left ovary I have also been getting stringy clear CM. I done an ovulation test to see if I’m ovulation is late but my periods are always accurate. Maybe I’m thinking into it too much but I feel odd. Need some guidance??