Does it hurt my body when I have my period more then once a month because of of misusing birth control?

I've been using Loestien 24 since April of 2010. I've normally been really good about not missing days but lately I've missed a few which has spurred early periods. I am currently having my second period this month. Can this "second periods" effect my body poorly (now or in the future)? Also, if this were to happen again, possible a few times how would this effect my body?