Getting pregnant while having the iud?!?

Hey ! So I have a 8mo old so just yesterday I took a test and it looks really faint , but I also have the iud šŸ¤¦šŸ½ā€ā™€ļø could it be ? I also Exclusively pump could that giving me a miscarriage? Could the iud mest up my pregnancy? Pls give me back opinions Iā€™m just as in shock as ever . When should I take the second test ?