Pregnant?

Hi everyone! I have been on the Mirena for almost a year and I usually have my period every month...lately I have been feeling sick (nausea) I also have discharge and missed my period this month. The first thing I thought of is AM I PREGNANT. I’m beyond nervous to take a test. I have a one year old already and I can’t imagine being pregnant again at this time. Have any of you ever became pregnant on the iud??