Ive had my IUD since august 2016. I get my periods every other month. Has never failed. Im a month and a week late. Ive been really tired for the past month as well as moody. I cried while watching cute videos with my bf. We usually have sex multiple times a day everyday. Yesterday I noticed a dark brown discharge i though was blood so i put a tampon in but it only did that for about an hour. Last night i threw up once fully and multiple times in my mouth. My bf was excited and happy but i was freaking out. Is it possible i can get pregnant with Mirena IUD?? Should i test asap?