When to test

I’ve been trying hard this month & im 4 days away from AF , I’m so nervous I’ve wasted so much money on tests cause I don’t even know when to test hoping for a baby ❤️ I see a lot of people saying wait to test but actually when should you test? I’ve also been having sore boobs since ovulation, food isn’t tasting normal to me.. I’ve been peeing a little more and it’s a sudden urge when it happens maybe it’s google and my head playing tricks on me 😂🤷🏼‍♀️