IUD Mirena IUD Question

On August 2, 2016 I had the birth control Mirena IUD inserted. I read all kinds of information on it before the implant and I always came up with same answer. But I wanted to get insight from other women who actually have or had it.

Now for the question all information warns you thete may be spotting or bleeding 3-6 monthes does anyone know how to or if there is a way to shorten that length? Because I hate having to worry about spotting or bleeding.