btw. I use both wondfo and clearblue advanced. everyone kept telling me clearblue will pick up before wondfo and then I’ll get the positive. but on 7/18 they both matched negative & LOW. Then on 7/19 I got a neg wondfo but a high clearblue advanced (blinking smiley) same for 7/20. But on 7/21 I got a PEAK on clearblue (static smiley) but still negative wondfos. If you know how CBA works once you get the static it stays for 48hrs. So the two days is finally up, I use clearblue again and I get the ⭕️ (LOW) again. But I know I didn’t miss a surge. As you can see by my strips.

This is 7/21.