What day would be 7 days after ovulation...

I've gotten positive opk tests since day 13 (today is day 17). Since yesterday I've have a cramping tugging feeling. Wondering when I should request my *day 21 progesterone... She likes to do the progesterone 7 days after ovulation, even if it isn't technically day 21. 
If I'm not pregnant this cycle in going to request an ultrasound at day 14 to see what the follicles look like and the status of my cysts. I do know that cysts can have some bearing on opks but wondering if they're the issue or something else. 
Edited to note that my dr wants me to test through to make sure there is a fall in my hormone.