I Am 65 And Have Lots Of Allergies, Especially Ragweed

I am 65 and have lots of allergies, especially ragweed now. No BP problems or meds. I have an increasingly serious balance problem since a cruise 6 years ago. See neurologist. Nothing can be done except use a benzo if very unbalanced. Allergies can make balance worse. Have taken various antihistamines for years (clarifying, zyrtec and most recently zysal.) My question is whether zyrtec might cause less dizziness and fatigue than zysal or vice versa....or another antihistamine altogether, yet one that works on allergies well?