I had my IUD inserted October 2005 after the birth of my second child. I never had any spotting or bleeding during the last 4 years. Today I was in the restroom and had a dark discharge on my underwear and light spot when I wiped. I wan to know if this is the start of my period? I have had a few things change in the last few weeks. I have had surgery, lost 30 lbs. and just started having sexual intercourse again. my ex and I separated 4 years ago and I have not been sexually active since. I just am trying to make sure that my body is trying to start a period due to the shock it has received from either my surgery or rapid weight loss, and not that my iud has decided to let me conceive again.