Hello, Me And My Boyfriend Had Sex On Jan 03

hello,
Me and my boyfriend had sex on Jan 03 2016 at 8:00 am and the condom broke, we live in the bush and did not have the chance to go get the Plan B pill right away. The next morning I was bleeding and my periods weren't due till the 12th of Jan, so I asked my boyfriend to bring me to town, I talk to the pharmacist asking him if it was to late for me to take the pills. He said it's within 72 hours therefore I should be fine. I then took the pills and went home. However, I am still bleeding and it has been 8 days now... and the bleeding doesn't seem to be stopping or slowing down... I know Plan B can effect your periods, but is this normal or should I go see a doctor? I have slight cramps but they are very mild and do no last very long. I am tired and cold and get dizzy spells to.