Positive OPK?

Hi girls, would love the help! This is my 1st cycle after a miscarriage in early July. 
I'm on cd20 today but I generally have longer cycles. 
​My cervix is high, soft and open, CM is egg white and tons of it and I've been cramping quite strongly on my lower left side. 
​Today's OPK is below but my urine looked pretty diluted. What do you think? Is this my lucky day?! Thank you!!