What are the chances of getting pregnant when i had protected sex a week after my period started? no visible holes or tears on the condom.

Testing the Only Way: Chances, odds, incidence, risk, etc. Are all after the fact data from large groups of individuals; however selected, tracked & measured, thus, though history tends to repeat, chances are after the fact & only apply to historical group averages, not predicting any one individual's outcomes. Sperm cells are microscopic, thus absence of visible holes means little. Pregnancy test only helpful option.