My last period ended Aug 3. On Aug 4 I had sex and the condom broke without us noticing. He ejaculated without knowing the condom had broke. When he pulled his penis out there was nothing in the condom. So everything had to of gone inside.

I purchased Plan B (Levonorgestel) and took the first pill within 3 hours of sex. And Took the second pill 12 hours after the first like the box said.

It has been 30 days and I don't feel any signs of a period. I usually do, and it is usually 28 days. I have not yet take a pregnancy test yet.

Does taking Plan B so soon after the end of my lat period really affect things?

Should I be worried?