Kyleena and pregnancy

I have Kyleena and me and my partner always use condoms. The kyleena has stopped my period over the last three months. I have been experiencing nipple pain, nausea and acid reflux over the past week to a week and a half. I used a pregnancy test two days ago and I was negative. Do you think with a negative pregnancy test that it could be possible that it’s a false negative and I’m pregnant or am I overreacting?