me and my bf canadian had sex when he visit me here and im think im fertile at that time.then before my period starts i feel something on my boobs getting soar and tender/big,and my stomach big too,everyday headache and fast pulse beat.i feel im pregnant but i take twice pregnancy test it says negative.then i have my period now 4 days late and its dark brown blood sticky and a little red <textarea name="message" rows="15" cols="35" wrap="virtual" style="width:450px" tabindex="3" class="post" onselect="storeCaret(this);" onclick="storeCaret(this);" onkeyup="storeCaret(this);">me and my bf canadian had sex when he visit me here and im think im fertile at that time.then before my period starts i feel something on my boobs getting soar and tender/big,and my stomach big too,everyday headache and fast pulse beat.i feel im pregnant but i take twice pregnancy test it says negative.then i have my period now 4 days late and its dark brown blood sticky and a little red blood.what does it mean?am i pregnant?i need your answers asap pls help me.tnx :-D