Negative opk’s but all other ovulation symptoms

Hello,

I’m ttc with my 1st after a miscarriage a year ago. I’m new to the app so please bear with me if there is an obvious answer to this question..

I’ve been using opk strips since day 10 of my cycle this month. At first, the second line was light, but still visible. This happen the next day as well, and then the line started getting lighter and lighter each day..

I’m having the egg white CM and I’ve been feeling some dull cramping on my left side (both are normal indications for me that ovulation is close). I’ve been testing multiple times throughout the day and even used two separate brands of strips.

Is it possible I’m still ovulating even if the opk strips aren’t detecting the surge? I’m so confused by this. My cycles are always regular.. (28-30 days)

Has this happened to anyone else?