9-10 of cycle

So my boyfriend and I aren’t trying to conceive but we are not doing anything to prevent it from happening. I was just wondering if anyone has gotten pregnant having unprotected sex on day 9-10 of cycle. I have also have had very watery CM on those days and a lot of it but today (day 12) I haven’t had nearly as much and still watery. I couldn’t tell you if it’s been stretching I haven’t paid that close attention to it. I know his sperm can live up to 5 days! I have done a lot of reading on this so I know it can happen but I want to hear your story!