Glow has been very accurate in predicting my periods since I started using the app 4 months ago. It told me that the one for November should have started 8 days ago. I took a Clear Blue test after it was 3 days late and it said Not Pregnant. The <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> had pushed my period back 4 days. It still hadn't started and after putting on my daily log that it hadn't started it was once again pushed back and is now supposed to start tomorrow. I took another Clear Blue test this morning and it also said Not Pregnant. I am now hearing that the Clear Blue tests that have the Pregnant or Not Pregnant aren't very accurate.

Should I wait before testing again or use another brand?