Oh the pollen is outrageous this year. I had one of those coughing fits last night and almost vomited. I take daily claritin in the morning and benedryl at night before bed. You have to keep the dosage even by taking it at the same time every day so that it "builds up" in your system. And it does take time, like 3 or 4 days, before you start feeling the benefit.
You can also increase your intake of Vitamin C and also take something to boost your immune system because while you are fighting the allergens, some other bug might just take advantage of you while you are distracted with allergies.
I've got my daughter on the claritin this year because she is suffering as well...so bad she is getting major nose-bleeds from her raw sinuses. Its rough out there these days! I have a new nick-name for my car...The Pollen-Mobile!