Anyone with tips for optimum function with allergies?

I am struggling right now. There is something in the air that is making me cough and my throat is getting sore. I feel like I can't breathe.

I can't open my windows! I am so desperate I turned on my disgustingly noisy air purifier. It's sort of like running a leaf blower in my living room.

I took cold medication because it contains a decongestant along with the antihistamine, and that was not sufficient. I took half an allergy tablet and all the medication hit me like a lead weighted sock and I was in bed at 5 pm sleeping it off. I am thinking (seriously) of fishing out my air filter masks.