No LH surge

Lorraine • 34yrs old ttc
I've been ttc since jan I started using opk last month&got a solid smiley face on cycle day 25 my periods come every 40 days. This month I started opk on day 20 my lines have gotten lighter everyday since I started testing&i used a digital I got solid circle. Do you think maybe I ovulated sooner? I've bd 2-3 times sometimes more each week since my last period ended