Hello and thank you for the wonderful site. It's helped eased my mind a lot. I had unprotected sex on Jan 25th on my fouth day of my menses then I took Plan B just the day after as a precaution. Five days after taking Plan B, I experienced the withdrawl bleeding so I'm assuming it worked. Though I feel it's highly unlikely that I am pregnant, I would like to take a test just in case. My normal schedule period won't be until the 24th accoring to the app I downloaded, so would it be good to take it around 22nd if my period hasn't come in early by then?