An early period?

So my period decides to come a whole 9 days earlier than expected.  Caught me off guard- I had no idea it was my period until the bleeding kept getting heavier and heavier.  I finally realized- oh this is my period.  The nurse said it could have beeb due to the Lupron shot I received a few weeks earlier that caused it to come early.  So, I guess it wasn't the worst news because with it coming earlier maybe we can def. do a treatment this month.  I will finish the antxb. shortly.