How early can I test?

Hillary • Wonderful🤴 + 2 beautiful stepsons 👦👦 = 👨‍👩‍👦‍👦 1 sweet angel 👼 TTC rainbow baby #1 🌈👶

I’ve read on medical websites that you can test up to 5 days before AF with early response test. I’m 2 dpo, but 5 days before AF. Can I test? (We did BD every other day during fertility cycle.)