TMI pic - CM question

Becca • RN, dog mama, yogi, nature-lover. Pregnant with our rainbow after three losses. EDD 5/2/15.
So I never have spotting before AF. I've had creamy CM ever since O and yesterday it was rust colored... No spotting and not when I wiped, just when I checked CM. Now it looks like this... I'm 13 dpo. AF due tomorrow, weird pain in lower left belly but no cramps, no zits, cervix high and soft...
​Wtf?? Had a faint line at 9dpo but couldve been evap. 
​Can this be implantation??