the last time I had sex was 3 weeks ago and about 2-3 days after that I had my period for the right amount of time a week. so one week goes by and everything is normal but on the 3rd week I've noticed that along with my discharge that it was a little pink and sometimes a there was a touch of brown but it's been getting to a darker brown red. no idea as to why it's like this. I do have a copper iud that I've had for almost 11 months now