HELP!!!! NEED OVU TESTING ADVICE!

✨Cassidy✨👨‍👩‍👧‍👧👶🏼

So my husband and i didnt track with baby #1 it was just if we get pregnant we get pregnant kind of thing. We want to try for baby #2 in May. But i dont know when i should start tracking? Should i start next month? As im sure my ovulation window has already passed this month. Please someone help i need advice 😆💜