Alllergies. Some facial dullness!

I am a 26-year-old male experiencing persistent morning symptoms that I would like evaluated. My main concerns are: • Waking up with significant mucus in the throat • Frequent need to clear my throat in the morning • Nasal congestion, especially on waking • No typical acid burning sensation • Symptoms are worse in the morning and improve slightly during the day I have a history of sinus allergies. I also suspect possible silent reflux (LPR), as symptoms seem worse after sleeping, but I do not experience classic heartburn. There is no fever, no severe facial pain, and no foul-smelling nasal discharge. I would like guidance on: Whether this is allergic rhinitis, post-nasal drip, or silent reflux (LPR) Whether I need any investigations (ENT exam, allergy testing, endoscopy, etc.) Appropriate treatment (antihistamines, nasal spray, acid suppression therapy, or others) Whether antibiotics are necessary (currently no signs of acute infection) Additionally, I have noticed some facial dullness