If it doesn't "break" (you mean rip down the seam) , it doesn't matter if it is 100 years old.
It is time to move on instead of asking irrelevant questions and imagining waste matter bored a hole into your condom to infect you.
Your condom didn't break or you'd know it. I would not worry about that. She sounds careful as she told you she saw blood. The only ways people get HIV is to have unprotected vaginal or anal sex or share IV needles to inject drugs. Only the head of the penis needs covered. So, you did not have a risk.
If a condom fails it rips down the seam and hangs broken so that didn't happen. You can't get hiv since you used the condom.
All those scenarios you worry about are non-events when you have zero risk.