Throat Congestion and Pain. Experience.

Hi Docs, For past 3months I have been experiencing throat Congestion(feel like something is blocked) and Pain all the time, beside and below Adams apple area. My Blood test is normal. No bacterial or viral infection. No other symptoms also. I went to check with 2 ENT doctor. Both did endoscopy and said I don't have any issue in throat. But they see me until my vocal chords and told me that I am alright and informed me of acidity and prescribed omreprazol tablet. But I just realised congestion is below my vocal chords. I have no idea what could it be. It will be of great help if any one could share their experience and enlighten me of this pain. It's very traumatic experience. Thank you very much for your help. Regards Raj