no ovulation?

Kasey • 24 ♋

I use the Clearblue digital opks and everytime I have tested this month I have not gotten a "smile" at all. I'm due to get my period in a week. is it possible that I could not have ovulated this month? or conceived before I would have gotten a "smile"? I've been very nauseous this week. we have been TTC for over a year but have just gotten to the point if it happens it happens. I still track my cycle and use opks.