There are several prescription nose sprays including astelin, atrovent and patanase. Have you tried Claritin or zyrtec or allegra? Nasal saline spray may help simply by flushing out the allergens. You could also try an older sedating antihistamine such as chlorpheniramine or benadryl (diphenhydramine). They may dry you up more than the newer non sedating antihistamines.
Would you like to video or text chat with me?