Implantation pain or what!?

mrs.mag • 💍 7.26.14 | 👧🏼6.19.15 | 👶🏼 7.27.18
For the past two days I have had some cramping that feels kind like ovulation. I ovulated sept 24-29 according to glow. I was confused so I took the clearblue ovulation test last night and this morning and it came back negative.. AF is supposed to start on the 13th.. When should I test? This waiting game is killing me!!?