Bloody sputum?

Hi Im a 26M 172cm 75Kg no history of smoking and currently not taking any medication. I have been experiencing strange symptoms since December last year. Every morning, usually after a few coughs Id spit out pinkish looking sputum. https://imgur.com/a/NgCurDC. The urge to cough is caused by the need to clear the throat (feeling like theres something stuck plus feeling the need to gag/puke) otherwise Im not really coughing involuntarily.

I have done: Xray (Dec 2023) NORMAL Sputum Culture and Sensitivity (Dec 2023) NEGATIVE Gene Xpert (Dec 2023) NEGATIVE Nasal pharyngeal endoscopy (Jan 2024) NORMAL Chest CT Scan without Contrast (Jan 2024) NORMAL Chest CT Scan with Contrast (May 2024) NORMAL Nasal pharyngeal endoscopy (May 2024) Showed signs of LPR.

Is there something I have yet to consider? Does this need further investigation?