Period or Implantation?

Hi everyone. So my fiance and I are trying for baby #2. I was 16 when we got pregnant with our son and never noticed if I had implantation bleeding or not because I didn't think of being pregnant. So 11-13-18 I started out moderate bleeding then on throughout the day it got lighter and even lighter like it was light pink in color to 11-14-18. Well the 16th and 17th I had nothing but spotting brown discharge and nothing else ( cramping a little). Well early this morning I had light to mild cramps and started feeling nauseated. My period is usually 3-4 days with mild bleeding. Pics of BD days, period days etc down below. Thanks in advance..