Could i be pregnant?

I’m late for my period, on all 5 of my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a>. I’ve been irregular for a while now, and my periods have been crazy. I took a pregnancy test today and it was negative; my last period was on May 13th. My husband and I are trying for a baby, but my crazy irregular periods are making it difficult. Is there any way I still could be pregnant and it just be too early?