When to test 🤔

So let me start by saying my periods are super irregular. I use 4 apps to track everything. Two say I should start my period tomorrow, two say I have 6 more days. I’m currently 8dpo according to what they calculate. If my period doesn’t come tomorrow, should I take a test tomorrow/the day after? Or should I count the later start period date before I consider myself late?😬

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