spotting idk why please help i need yall girls

Me
I had unprtected sex last week and i took the plan b pill... everything on was going good untill i had sex again but this time we used prtection.... i been with my bf for almost and year and this is the first time that im spotting and it werid bc my period does not come till the last week of the month... i been spotting for two days already .. and i did research and idk but it says i might bepregnant but i honeslty idk... have yall ladies had this before