Accuracy

How accurate is the calendar for you all? And how long did it take to sync up for you? This is my first month using Glow, it predicted I ovulated yesterday, but i had skipped my period for may, and bled for 3 weeks. So I have terribly irregular periods. I checked my CM today and it was sticky, and clear. yesterday is was white, creamy, slippery. I have been forgetting to track my bbt, and i’m new to the tracking thing so I don’t even know what to look for. 🤦🏼‍♀️ SO and I did the deed today, but i don’t know if I’m even in my window