Hi anon,
While there are some days when a woman can become pregnant and less likely days, a woman can technically become pregnant at any time from live semen being in the cervix.
If you are sexually active, we encourage you to see your provider to discuss the different birth control options that are available to you. To find a confidential, free clinic near you, check out the health center locator: https://factnotfiction.com/clinic-finder
Hope this helps.