Hello, i had my period on March 7th and had sex on the 21st of March 2015. one week later i had sore breast, milky vaginal discharge, nausea, urinate alot, plenty saliva, movement in my bowel. i missed my period on the 6th and took a urine test on the 8th and it was negative. what could be wrong
Wait a week or so and retest if you don't get your period.
The problem is that home pregnancy tests are only really accurate when they indicate positive. False negatives are VERY common. False positives are VERY rare.
If your period started on March 7 you'd have been near peak fertility on the 21st, day 14 of your cycle.