If I started taking pills from the second day of bleeding, am I protected from pregnancy or take 2 tablets at a time?

You have not written what pills you use. As for the Drovelis preparation tagged next to the question, please read on. Otherwise, please enter a valid name for the medicine. You should start taking Drovelis on the first day of your menstrual cycle (i.e. the first day of menstrual bleeding). If you take Drovelis on the first day of menstrual bleeding, it provides immediate protection against pregnancy. You can also start taking Drovelis from day 2 to day 5 of your cycle, but in this case you should take additional protective measures (e.g. a condom) for the first 7 days of taking the tablets. If you started Drovelis from the second day of bleeding, then sexual abstinence or other protection against unwanted pregnancy should be used for a week. However, you should not take two tablets of the drug at once. I enclose additional information about the drug Drovelis - the preparation can be booked through GdziePoLek and picked up stationary at the pharmacy upon presentation of the prescription: https://www.gdziepolek.pl/produkty/111326/drovelis-tabletki-powlekane/apteki/w-warszawie