Have mirena (levonorgestrel) iud. having spotting n pregnancy symptoms. strings can barely be felt and use to be much longer. can i be pregnant?

Pregnancy test yes: Have to do a blood pregnancy test especially if you're not sure. Mirena (levonorgestrel) may cause bloating. But with time you're body should adjust as to bleeding less or nothing among other symptoms. If you had no bleeding as Mirena (levonorgestrel) may cause after some months or first year, and resume spotting or bleeding you need a Gyn visit for blood test. Also STD screen and possible ultrasound to verify location of mirena!