How long should I wait to test?!

Hi girls!! So I have a question for y'all. June was a big month of lots of no pulling out during sex. ( Sorry for that TMI statement ) Some times it happened right before/during/after my fertile window. We aren't actively trying to get pregnant but we obviously weren't avoiding it either. My period is supposed to come today according to Glow, and it's usually a day or two early from Glow's prediction. Obviously it's only 9:47am and I have the entire day/night to wait for my period to come. But! I was just wondering how long I should wait to take a test?! I've never taken one before, and I am actually really excited to, and I hope my period doesn't come and rain on my parade. Should I maybe wait a few days and see if it does show up, or jump the gun and test today?? The husband chose to work today so I'm all alone with my thoughts and excitement, and there are 3 Targets in a 2 mile radius from my house - and I'm just chomping at the bit 😩 Any advice helps, so thanks in advance!!