Help, I'm nervous

Isabelle

My cycles are about 29-30 (except on August, I menstruate until 47 day) I had protected sex on my CD 2 of this month (October 19th) and unprotected sex on CD 22, he didn't eyaculate, and it was 6 days after ovulation. I'm scared, I'm 4 days late AF, no symptoms. What am I supposed to do?