I need some help knowing when I should test. My cycle is very very very regular and is 28 days from the start of my last period and last 7 days. Well last month was a very weird period. I had spotting which began on August 19th and continued for 3 days. Then on August 22nd my period seemed like a normal flow and ended with very light spotting on August 29th.

Glow is telling my my period is supposed to start on September 29th. But if I count from my spotting my period would have started already and then if I count from when my flow was "normal" that'd put me at tomorrow (9/20).

This is our 3rd month trying and it was so disappointing to see the negatives the last two months and AF. I just don't want to waste more tests to get negatives and then have my period come a few days later. I did have spotting on the 16th and 17th but that was only 2/3DPO. So should I test in the morning or wait until 9/29 when Glow is telling my period should be here?