Plan b

Candie

So i took a plan b a week after my period and a couple days after the plan b i started to bleed dry blood and then got lighter after like i was on my period again but they said that was normal but now its been 2 weeks after that period and now i seen spotting like if it going to come but it says the next period is till the 2nd of oct. did it just come early or is that normal .