period is due today no sign of aunt flo

I had a chemical pregnancy last month I tested positive a few days before my period was due and then had an early miscarriage/ a day or two off of when my period was due. I have back ache/ and twinges but no cramps or spotting (I usually always have spotting leading up to period). took this yesterday the day before period was due. I don’t think I see anything. Could it have been too early to test? (also I was dumb and didn’t test first thing in the morning)