(19M) Did I get her pregnant?

I had unprotected sex on the final day of her period (seven days before she ovulates according to her cycle). From what I've read the odds are slim right? Since sperm only survives 5 days in there. I've also had an unhealthy lifestyle past couple of months (lots of drinking and smoking cigs) and that affects sperm health.

(19M) Did I get her pregnant?
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