re: Anybody ever done allergy injections?

About 10 years ago, I was going to this immunotherapy clinic and getting injections, one in the back of each arm once a week. It worked pretty well. I did it for about 2 years and stopped getting Sinus infections and any other allergy related problems. Only issue was the clinic was on Hennessy by OLOL and the traffic from there to my office was brutal. I kinda figured I was "healed" as long as I took Allegra and Flonase. But recently I've been having some pretty epic problems. I got a cortisone shot the other day and they recommended the injections again. Not sure what to do. It's a pain in the arse. It works, but still... Is it worse getting a cortisone shot every 4 months with symptoms, or staying symptom free getting shots every week?