Hi, welcome to the ehealth forum and I am glad to help you.
You seem concerned by the symptoms from acid reflux viz. constant throat clearing, dry cough and water brash etc. You have also made a mention of H.pylori being detected on blood test.
It is possible that the symptom complex that you have mentioned might be due to acid reflux. H.pylori has been found to be responsible for Acid reflux. Your doctor has rightly suggested the antibiotic course for eradication of H.pylori which can help in relieving the symptoms. Endoscopy has been advised to look for the damage to esophagus from acid reflux i.e. ulcers etc. and to rule out any other serious causes of dysphagia(difficulty in swallowing).
Hope this helps. Take care.
Note: This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.