OPK question

Kristina • Married to the love of my life with two beautiful sons!
Hello! So I keep getting low opk on clear blue advance digital tests. I was regular last month and got flashing and solid smileys like you are supposed to. The problem is is that I am feeling cramps on either side and have ewcm, all symptoms I get when ovulation starts and I really want to make sure I don't miss it! Hubby and I BD yesterday and will a couple more times this week just to put our best effort in! Maybe my cramps and such are starting because ovulation is about to start? I'm still new to all this so ty in advance for the help!