TTC Spotting 3dpo

Im currently TTC and yesterday i experienced a few hours of very light spotting and some light cramping down there as well at around 3 DPO according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>. My period isnt due for another 11 days, could this be implantation? & when should i test?