IUD help

Alright, ladies, I am having some weird spotting in between my periods. Literally, every day. It's especially worse after I have sex. There is no pain, and it's not like it's just now starting. I have had my IUD for about a year, a little bit over, an this has been going on basically since I got In it. So, should I be worried? I have had it checked out before, but it was fine. Anyway, is this something I should be worried about?