please help me

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
Okay so I had af in march. I had it the 2nd -the 7th. My last 29 was 29 cd. When should I have gotten or should get my af. Every calendar I have says I'm 6 or 8 days late. Is that right?