Yes, my hayfever tends to get worse constantly. Where I began with no allergies (well, cigarette smoke always got me), I'm now allergic to many things year round. This occuered after I had shingles a number of times in one year and is one of the reminders left.
A HEPA filter on both your furnace/air conditiioner and air puriifers (now quite small in size compared to the original model) are very good.
I agree with Hip, an air purifier helps a lot but you may have to buy more than one. Fortunately the price has also been reduced. Our newest filter is very thick and doesn't have to be changed as often.
I love being outside, but of course I can expect problems of some sort or another. It's often hard to tell an infection with a general cold. Mold/mildew can be a major problem for me. Even though our Xmas decorations are in boxes and covered in plastic, dust still develops over the years, but fresh greenery can also give me problems. The air purifiers provide some relief.
I use acupressure to relieve symptoms in my forehead and facial areas. I'm sure you can find something on youtube showing you how to do it. Acupuncture (tried a no. of times) did nothing, but the acupressure had benefits. My husband also has severe allergies and has had the injections over the years....finally, after approx. 50 yrs., they're working. Yours, Lenora.