How long after miscarriage did you take a test for a possible new pregnancy

I had a MC, 4 weeks ago (I was only 6weeks). According to the app (& another app) my period should have come 4 days ago, I know MC can make cycles longer than usual but I’m wanting to know when did you take a test? I can’t bear the thought of a negative test so I’m happy to wait another 2 weeks ✨