My periods before I started this pill about 5 months ago were very regular. Even though they lasted 4 or 5 days, they came at the same time every month. Now I get it for two weeks straight even though I'm taking my pill at the same time everyday. And on top of that, my contacts have been bothering me since the second day I started taking Loestrin. Let's just say a 5 day period with clear vision is WAY better than a 14 day blurry one!