Aftera - I need some help because I’m worried?

As you are irregular with your periods, you won't know where you were in your cycle, but it's important to know, that, if you are already ovulating, then it may not work.
The only emergency contraceptive pill proven can prevent pregnancy during the 24 hours around ovulation, itself, is Ella (Ulipristal Acetate), & even that one is not guaranteed. Just something to be aware of. Aftera might, but it is not proven. The only way its proven to work, is by delaying ovulation, if it had time.

It's really difficult to know if it worked on other occasions. To know that, you'd have to know for sure that you would definitely have become pregnant, had you not used it. It may have worked, it's just something to be aware of. You may have just not been fertile, or even been fertile but just not conceived on that occasion.

It's really common to have a late period after Aftera/Plan B/Levonorgestrel. Women who do not have regular periods before using this drug, often wait longer for their period. I've spoken to many women who were irregular to start with, who've waited months for a period, after using this Drug. More commonly, it's weeks.

I recommend doing a pregnancy test when you're far enough along. If it's negative, & you still do not get your period, your doctor may agree to do a blood pregnancy test. You can always ask at what point they'd consider doing one for you.

I hope you get the result you want.