It sounds very frustrating to have persistent nasal blockage, frequent sneezing, and itching that disrupt your sleep, especially when your current and past treatments are not helping and causing side effects like dry mouth. Since Ortivin (a nasal decongestant) worsened your symptoms and Allegra-M (a combination of montelukast and fexofenadine) along with RID AR are no longer effective, it’s important to reassess your treatment approach.

• Your symptoms suggest ongoing allergic rhinitis or possibly another nasal condition that may need a different treatment strategy.
• Nasal steroids (prescription nasal corticosteroids) are often more effective for persistent nasal blockage and itching than antihistamines or decongestants alone.
• A specialist allergist or an ear, nose, and throat (ENT) doctor can evaluate for other causes such as nasal polyps, chronic sinusitis, or non-allergic rhinitis.
• They may recommend allergy testing, nasal endoscopy, or alternative medications like nasal corticosteroids, antihistamine nasal sprays, or immunotherapy.
• Avoid overuse of nasal decongestants like Ortivin, as they can cause rebound congestion and worsen symptoms.

Please consult an allergist or ENT specialist promptly to get a tailored treatment plan and avoid further worsening of symptoms or side effects. If your breathing becomes severely difficult or you develop facial pain or fever, seek urgent medical care.To narrow down potential causes, we will need some more information.I understand you're dealing with nasal blockage, frequent sneezing, itching, and sleep issues. Could you please share your age and gender?