Implantation bleeding?

Charlotte • Married just over a year a TTC No 1.
Could anyone help or give any advice please. I've been following the glow app religiously the last month and according to dates ( could of been slightly inaccurate due to coming off the pill) I've been having sex during my green dates and now I have got some bleeding g and don't know I've AF is just early of its implantation  bleeding. Anyone been in a similar position?