I've been on ortho tricylen lo since near the end of april. My period has been fine since last month. My regular period came on time, it comes on the 15th of tha month and lasts for 5 days. Soon as it went off the following week i cramped the whole time. That monday my period came back on and its been heavy (my period's never been heavy like that) and it's still on and i'm still cramping. I don't understand need some help

Definitely time to see your doctor. This could be just a fluke thing, but it could be something serious too. My friends mother has something very similar happen to her, and she nearly died from it. I'm not trying to scare you, but that's kind of a long time to bleed as heavily as you say, and there be nothing wrong.