Highly unlikely

I've been on mirena IUD for almost 3 years no problems besides weight gain and horrible cramps. 
lately I've been very emotional which is not like me like this morning I read an article about a dad that was deployed flew back to see his sons play and I almost started crying for some odd reason. and I've been wicked nauseous 
I know it's highly unlikely that I'm pregnant but should I take a test incase?