A nasal bleed due to fingernail trauma could present like this. Repetitive throat clearing might be cause of the bleed. However most of the problems you seem to have are trivial. Visit your ENT Specialist to get a nasal endoscopy and an Fibre optic Laryngoscopy.
Next Steps
Start with some antacids, use Nasivion nasal drops, if still problem persists, get a check up
Health Tips
Avoid stressing on the issue and consult your doctor