Early ovulation

I use FAM to avoid pregnancy and normally my cycles are 35 days and I ovulate around day 21. I had (unprotected) sex Saturday morning which was cycle day 9 thinking I was totally in the clear as I normally would be but the past couple days I’ve noticed egg white CM and last night I had ovulation pains so I took an opk today and it was positive for lh surge. Today is cycle day 14. So basically my ovulation happened a whole week early for some reason but now I’m worried about pregnancy. What are the odds if I had sex on Saturday (day 9) and had an lh surge Thursday (day 14) I could become pregnant?