Nexplanon period ?


So my period came on Thursday and it's was the first in about 3 months. I have checked to see if I was pregnant before just in case and I was not. But the period I have now like it's like I am bleeding but not really. Yesterday I did have sex and afterwards I was bleeding a little and it was like a light red not a dark red like I was on my period. And when I go to the bathroom and wipe there light red blood but never oh my like pads or anything