Ovulation maybe?

To start, I am very irregular; my cycle has ranged from 73 days to 27 days, which has been the lowest. I rarely check ovulation, and when I do, it's only with opks, but I'm pretty new to it. I am on cd55, so maybe my period will start soon, but I had very fertile cm and was turned on all day yesterday, and my husband and I had sex last night. Could it still be possible for me to have ovulated?