Short of Breath—when to worry?

It’s been exactly one week since the onset of symptoms. I’ve felt fine the past 3 days but today it’s getting increasingly harder to breathe. My inhaler doesn’t help. I’m short of breath constantly and I feel clammy like I have a fever. I’ve also been coughing up phlegm and sneezing a little bit. I’m 22F with extremely mild asthma and I’m 3x boosted.

Did anyone else go through this? When is it time to see a doctor? Also, if there are any OTC medications that might help with this please let me know.