Anybody else feel this?

So I have never been pregnant, and my husband and I use natural family planning but there are slip ups each month which could cause pregnancy. 7 months running I get convinced this is it thanks to phantom symptoms 😣 ... I take a test each month.. no cigar.. AF always shows up

This month we had sex to completion twice on 33% chance day and once a couple days before that... I of course have all these “symptoms” again but am driving myself crazy with anxiety... I want to be pregnant this month but for some reason something is telling me “no, it’s just not in the cards” ... my biggest fear is infertility and I can’t shake this feeling that this is my month but also not my month

Advice?

I am 8DPO with my period due in 4 days