Help! Be nice or don’t comment

Diana

Please be nice! My period is normally 3-4 days long and my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> says I’m 3 days late. I took a pregnancy test a few days ago and it was negative. I don’t take birth control (I’m steroid dependent) it effects my medicine so that’s why I don’t use bc. When should I test next?