Opk test

Do I have sore breasts, fatigue and frequent urination along with mild nausea. My period is due in 8 days so I decided to do an opk test just because and I got a blank circle. So I’m thinking that I am definitely going to get my period. I think this because when you are pregnant, your estrogen and progesterone increases so if there was even a chance that I was pregnant, wouldn’t the opk pick up the estrogen and give me a blinking smiley face? It’s too early for a pregnancy test but the blank circle would mean that there is no LH or estrogen so would that deduce that I’m about to get my period. What are all y’all thoughts?