Unusual forceful belching

Hi all,

Wondering if anyone else has something similar to me. I have always thought I suffered from chronic forceful belching but recently after a visit to the ENT was advised it could be a lung issue as it did not sound like the conventional belch.
Still think it is something to do with belching (have had SIBO and recently gallbladder removed).

Interested to hear of anyone who has unusual belching/ or undiagnosed belching.Getting worse by the day, belching pretty much every few seconds which is also causing headaches and neck stiffness. Really sick of this and desperate for a cure. Allergic to Nexium and have ruled out current SIBO.

Anyone on medication for relaxation - wondered if this may help?

Thanks