Early Period or Implantation ?

So today I realized that I've been bleeding a bit but it's really light, like spotting pretty much and I'm not supposed to get my period until the 13 of next month (obviously lol) me and my boyfriend had sex the week before and the week after my period and from Friday-today too ... but can anyone help me out ???? I don't know if I'm pregnant or just getting my period this early 
Can someone please let me know what they think about it ? Please ?