I have an iud (5yr mirena) for 7 years now and im having pregnancy symptoms could this be possible? I don't get periods....

YES. The contraceptive duration is 5 years. Yours has been in 2 more years. Get a pregnancy test. If it is negative you need to remove the Mirena (levonorgestrel) and insert another if you want. If positive need to see doctor asap.
Yes. It is very rare but it is possible to get pregnant with an iud. Take a pregnancy test and see your doctor.