hi everyone im 17 years old, and recently i have been noticing spotting... me my sister and my mom always get our periods within the same week.. both of them have goteen their periods..i am almost a week late.. a few days ago i notice a pink discharge.. a few hours later it turned from pink to brown... now almost everytime i pee, i get a few drops of blood when i wipe.. could this be implantation bleeding.. i had unprotected sex 2 weeks ago on may 23rd could i be pregnant?? please let me know