Nonexistent period?

Eliza

So I’ve been on lo Loestrin fe for a month now. I’ve just started my second pack a couple days ago. This is my first time to be on birth control. The <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> I always use says I’m 4 days late. I have only ever been one day late and that’s only happened one or twice. My cycle is 31 days when before it never was above 27. On average it’s 26. I spotted for two days when I was supposed to start. It was very little spotting. Was that my period? Or do I not get a period now? Or what? I’m very confused.