Advice

Its way to late for implantation bleeding implantation normally occurrs 6-12 dpo so it most likely your period starting

Yup

Have you still not taken a test? I can understand wanting to protect your peace but personally I would want to know whether I was getting pregnant and having early losses vs just not getting pregnant. If you’re just assuming or using a calendar method to estimate ovulation and the length of your luteal phase you may have just ovulated a few days late. If you’re actually confirming ovulation you should know how long your luteal phase usually is and that it won’t generally vary much so if your luteal phase is actually usually 14 days there’s a good chance you are pregnant even if you are also about to start your period. The body can also just be weird tho and some people have spotting but go on to have a healthy baby.