So I had unprotected sex with my boyfriend on Nov. 22nd, usually he pulls out but this time he admitted to not doing it. We purchased a plan B pill the next day and I took it. However on the 29th I started spotting and it progressed to what seems like a light period. Normally my period comes right on time but this time it came 9 days early. Has anyone ever had an experience like this? If so do you have an explanation for why my period came early? I'm just worried Google is right and it's actually not my period and is really implantation bleeding

UPDATE: 11 days later and I’m still bleeding lightly. I’m thinking about setting a doctors appointment soon. Usually my periods are only 4-5 days