If you take the pill correctly, you can't get pregnant. It was not necessary to take emergency contraception, it's reserved for emergencies only and you can be experiencing side effects for months for no reason.
If you took the ellaone emergency pill, it can render your pill useless for 5 days and you need to use condoms.
Plenty of pill users are having sex without a condom and don't get pregnant. It's what it is designed to do. You've asked this multiple times and got the same answer.