Spotting?

I have been having some very light pink spotting for about a half hour now, it was accompanied by ewcm and I'm wondering if it's implantation bleeding? 
According to one of my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> apps I was supposed to ovulate anywhere from the 14th to the 18th I'm not supposed to get my period till sept 2nd .