Faint line or indent?

KD321

My husband and I had sex for the first time since May 2021. My baby is now 16 months old and his birth was traumatic and took time to recover from . I’m older and should be less fertile because of pcos and age. We had unprotected sex January 7th. I just had my period but now wonder if it was implantation bleeding instead. Took this (not morning) is it a faint line or and indent? Looks like shadows.