Impantaion bleeding??

Memes • Hi. I am 26 years old and a mother of a 7yr old son. My fiance and I are expecting our second child in Jan. 2018.
Hello! My SO & I are ttc for our second baby. My AF is not due for another two weeks, the 25th to be exact. Today i experienced some light pinkish spotting only when I wiped. It only happened once when I urinated. I have been having mild cramping since this morning as well. I'm not sure what can cause this spotting since AF is so far away. My cycle is never early, only late if anything. Implantation?? Can it mean I'm ovulating? I'm currently in my fertile week since Wed according Glow. Any suggestions? Thank you for reading.