Yes, the endoscopy is the gold standard for testing for h. pylori. The urea breath test is a good noninvasive measure, but since you've had the endoscopy (provided you had biopsies tested for h. pylori) and it was normal, you can feel pretty confident that you don't have h. pylori.
You are correct--the blood test is not informative on current h. pylori infection.
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan