When to test?!?!? 🙋🏽‍♀️🙈🙊🙉🙀💝

So my hubby and I have been ttc and I'm 7dpo and I just wanted to know when to test because I've been having lower back pain and not necessarily nauseous enough to puke all the time but like certain smells and foods make me gag recently and it's things I love eating like omelettes and my coffee taste different. Also I was examining myself earlier and I swear my boobs have rounded out like you can't tell there was ever a slight size difference...should I wait till after the 4th to test since that's when glow predicted my next period????