My husband and I had a bit of a scare the first week of august. After discussing our options I went out and got Plan B One Step and took it about 48 hours after sex. My period was the last week of July. We had sex on August 5th and I took the pill on the 7th. My period came exactly a week later. So that's only 2 weeks between periods. It was a full period with regular bleeding. Then I got another period at the end of August into September. A normal week long period and nothing since. No spotting, nothing. Is this abnormality in my cycle normal? And when should I expect it to become regular again?