Copper IUD Period Problem

Paigee
I got my IUD (copper) in April 2015. I didn't want it but my doctor got sick of me messing up my birth control pills and popping Plan B so I followed the recommendation and it's a match made in heaven I don't have to think about getting pregnant but I'm freaking out right now.
Last month my period came sort of...it was just a bunch of spotting honestly sometimes it would reach a medium flow but not even enough to load up a tampon which was a waste. This went on for about a week and then it stopped 
I had period symptoms my flow was just all wrong. Now in July, it hasn't come at all, nothing. My period has always snuck up on me but should I be worried that my IUD is out of place? I thought with the copper one you get heavy flow, which I did for the first few months ? Is it possible I'm pregnant ? Please help eve :(

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