Ovulation with NEG opk

Misty

I’ve had 4 days of egg white cervical mucus and a lot of it and today I’ve had very noticeable O cramping-

Can you O without getting a positive opk? Technically I’m not supposed to O until Sunday but my OPK are not even close at all . I dunno if I’m taking the opk at the wrong time of day maybe or what...

Any in site would be great