me and my partner have been trying for a baby for over 2 year now. On 20/01/13 i found out i was 1-2 weeks pregnant but only a day later (21/01/13) i misscarried. i was not mentally fit to try again straight away so we used condoms. i had my last period on 21/03/13.. when we had intercourse on 28/03/13 the condom split and on the 02/04/13 just 5 days after i noticed a medium amount of brown blood in my underwear.. later following with a a couple of drips of red blood later that night. with the information iv read i didnt think i would be ovulating just 1 week after the first day of my last period and i didnt think implantation bleeding would happing just 5 days after unprotected sex. i read some infomation online and saw to take a test 3 weeks after unprotected sex..so i did so this morning 18/04/13 and it was negitive. can anybody help me what this bleeding may have been ?