No period symptoms

I am due to start my period tomorrow and I have had zero symptoms. Every single month my boobs hurt for the week before so bad I can’t press on them and I usually spot 3-4 days beforehand. This month I have literally had zero symptoms of any kind that I normally have. No sore breasts, no spotting, no cramping, no lower backache.. what is the possibly I could be pregnant is why I am not experiencing PMS symptoms? I did have unprotected sex with my husband around predicted ovulation, but didn’t track ovulation this month so it might have been earlier or later than usual.