10&11dpo could this be implantation?

So yesterday in the morning first thing I had a slight pink tinge when wiped and a few spots on my underwear throughout the day but nothing else. This morning had a bit of pink tinge again then just been to the toilet and had this but nothing on my underwear - one app says period due Wednesday but other two say Friday. Could this be implantation or am I likely out? Never had it like this before