Going crazy!

I didn't start taking opks until cd14 as hubby was away and I just didn't see the point so far no positive opk. We did dtd on cd8 before he went so I no that it (his sperm) may have covered cd8,9,10. Have been crampy for the paat 3 days and wake up feeling a little sick. Is there any chance I could have ov that early? Have taken some hpts but they're negative which I know wouldn't show but Igot itchy fingers. 😂

My period is not due for another 9 days. Would I really be having these symptoms this early?