I took Nordette pills (4 pills and another 4 pills 12-hrs after) 2 days after (1/10/12) having a condom breakage during our intercourse last 1/08/11. One week after (1/17/12), I experience spotting/minimal bleeding which is dark in color. Is this implantation bleeding already? I am really worried and anxious about my current state. What further actions should I do? Please help me doc!