Period or implantation bleeding

Larisa

Hello everyone I wanted to ask a general question cause it’s so hard to tell the difference between implantation bleeding and a period so my period was December 8 through December 12 and I did have unprotected sex during ovulation days and today is Dec 31 and and I have light cramping and moderate pinkish bleeding is this implantation bleeding or period and btw next period is in 5 days