[Coffee.]

It's normal for your period to do this. Mine was very irregular when it first started, and wasn't terribly regular until I was 14. The orange discharge could be some type of infection, but it could be normal. Call a physician and ask, or talk to your mother as well. You say orange, if you're meaning bright orange, that really doesn't sound right. If you're meaning a lighter red, it could be post menstrual discharge. But I'd recommend you see a doc.