did my period end?

Monica • Forever wanting the perfect body, but forever wanting wings.
<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>'s app just asked the question if my period ended. I started Friday evening and it's Sunday already and I'm barely even spotting, would that consider it ending??? If so how am I supposed to go to my appointment tomorrow for an ultrasound that needs to take place while I menstruate?