Anyone else have allergies like this?

I've always had pretty bad seasonal allergies (that are actually year round and not seasonal, haha)
Being on zyrtec, a normal daily allergy med keeps me under control enough. I feel okay. I still get sinus issues and stuff.
But, I know its full of stuff I don't want to be taking all the time forever.
So, I got these herbal allergy meds that worked AWESOME on my sinuses. I felt fine a day on them.
But, day two, my sinuses are fine, but within an hour of going about my day, my whole body is covered in a rash. Just burning and itching.
(This happens just going off the meds, I'm not allergic to the herbal one).
But this was worse. I caved and took two benadryl. And I'm still miserable.

I'm afraid these allergies will turn mkre serious and I'm not sure what to do.
I'm going to the doctor, but I want something not toxic ya know?

What are allergy shots like, how do they work? What did you guys with awful allergies do?
Anyone else have allergies like this?
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