I second Lauren's good advice to use a peak flow meter. That can give you a heads up that you need to take your medication or be more cautious. Additionally, you can always check a weather app to monitor humidity, temperature, and especially air quality.
I'm sorry that you're feeling anxious. That's pretty normal when you're facing a new diagnosis and still learning how it affects you. Are you happy with your doctor so far? Have you come up with an asthma action plan together? Having a plan ensures that you know what to do when you are having symptoms and don't have to think about it in the moment. Here's an article about that if you're unfamiliar:
https://asthma.net/living/asthma-action-plans
Please ask as many questions as you want and make yourself at home here. We're glad you found us! -Melissa, team member