Am I pregnant....?

Michelle
My boyfriend and I don't use condoms when we have sex, and he always cums inside me. I'm on birth control and I'm on the Mirena IUD. I've been having pregnancy symptoms but I got them before. I'm two days late on my period. I've been freaking out so bad. I also leave to the Army National Guard the 17th of this month. 
What do I do!!!!?