Late implantation = chromosomal anomaly?

I implanted on 11 dpo. I know because I had implantation bleeding and cramping that day and it was 11 dpo bc I was tracking my ovulation very accurately. I am reading articles on how implanting late can be because of chromosomal abnormalities and can even cause early miscarriage. Baby is also measuring a week behind in their dating scan. I would really appreciate any insight or experiences. Super worried!