Temping newbie help a girl out!

Paige

Hey guys did I ovulate CD19/20 normally only have 28/29 cycles never been longer last month I had positive opks on CD15

First month temping does my chart look promising? Had lower back pains today AF type but no other symptoms just before AF arrives also had this like pin pricking feeling like just under my ribs on the right side, would this be possible implantation?