Implantation bleeding or Af prepping??

I av 2apps to track my ovulation and period... the first app calculates ovulation based on info u input into it and the app and my New app "GLOW" predicts same way until this month when I started tracking using bbt... Glow changed my ovulation day after it detected an increase in my temperature and gave a new date different from the former....

I av never used the opk test... now my periods is moved to 1st of March on Glow cos ovulation occurs on 16/02.. the first app doesnt work wt bbt and said I ovulated on 13/02 n also predicted my period will start in 2days time... I Bd all through my fertile period and 3days after fertile period.

I went to use the restroom now and I saw a pinkish mucus after I wiped...I dnt know if it's my period preparing to come or implantation bleeding.. I have no pregnancy symptoms yet except that I perceived(sense of smell) things more and lil headache..

What do u suggest, am totally confused..