Gosh, that sounds really miserable to have gone this long with no relief and trying all these different remedies! (I am assuming you just used them one at a time and not together
Re the Zyrtec, I'm not a pharmacist or MD, however, I know that at times, people have said that they've seemed to get used to the medication and felt that it was not working...my daughter has taken Zyrtec 10 mg. every night along with Flonase nasal inhalor for at least 2 yrs. or more and it still works for her. I hope that continues!!
I'm glad you are at least trying the allergy shots! My son had great success with them - though it is something that you have to continue.
Perhaps some others will come along and add their thoughts to help you!