Sing, I'm sorry to hear about your allergies. I haven't had allergy shots, but would suggest you try something that would provide relief sooner. If you were still in the NYC area I'd suggest you go to Willner Chemists. They have a NY Mix, specifically for the pollens in that area. Since you are now in Minnesota, I'd recommend
--vitamin C, stinging nettles, quercetin, and MSM, as noted in PRESCRIPTION FOR NATURAL CURES by Balch and Stengler, a reference I use often
--a homeopathic approach, with or without the above. If you don't have a homeopath in your area you could try Lia Bello, who was very helpful with a friend's son's issues. Her prices are reasonable and she treats over the phone. (She's in Santa Fe, NM)
http://www.homeopathicare.org/There are also a number of combination remedies available at health food stores. Some of these can be quite helpful and are inexpensive (under $10), but you have to find the one that works for you.
I went to an allergist for a while, but he prescribed three prescription drugs, one of which was a steroid, and I can't say I felt any better. I did, however, have uncomfortable side effects. I then switched to homeopathy, which was more effective and had zero side effects.
Hope you find relief soon!