Hey ladies! I need a little advice!

Im on CD19 and i just received my peak on my clearblue opk. On Fri i had CD21 progesterone test booked in.

Ive had crampy pains on my left side all day not sure if its ovulation related? My temps arent really showing anything just yet.

Someone made a comment on a previous post about my chart saying i need i reschedule to 7dpo? Is this true? Will i need to move this blood test now? Its taken ages to even get this booked in im dreading the idea of trying to get another appointment??

Any advice???