I had unprotected sex on in December the 14th four days before ovulation, I've had sore breasts, feeling sick headaches and cramps. I took a test on the 31th of December 2012 it was negative, I also had sex yesterday unprotected my period is due today the 1st of Jan. But isn't a period at all, it's light pink blood and brown discharge, a little while later I went to the bathroom and it was still there but also a more darker red and like stringy ? Is this implantation bleeding or not ? A little confused.

1. How do you know it was ovulation time, are you tracking body temp ?
Those online or phone apps are not real and can not be used for real tracking.

2. you can not test a two weeks after sex and get anything but a negative test result
You have to miss a period and then wait at least 10 days, normally two weeks and then test.

3. the bleeding now can be anything, from pregnancy to just period getting ready to start.

If period does not come this week, wait till about Jan 14 and do a pregnancy test with first urine of the morning

It was an online app so haha um not sure now, but the smyptoms were what got me. Yeah it was two weeks after, but I will take another one soon. I'm all new to this so I'm not 100% sure all of this, first time trying. It's never happened to me before it been light and brown discharge. If I had sex yesterday is there still a chance I could be pregnant ? Thanks for all the help, means heaps!