Can endoscopic biopsy miss H. Pylori?

So I have not been feeling well for about 11 months.  My main symptoms are abdominal pain/discomfort.  When I haven't eaten for a while, I get what would resemble hunger pains, when I have just eaten something I get a bloated pain.  I am only naseated every once in a while but have never thrown up.  I do get funny chest shoulder pains or almost tingles that sort of itch.  I have not been able to swallow normally for 11 months.  I feel like there is a lump in my swallowing motion.  I also get painful tingling itching at the base of the neck in the esophagus (same as chest pain), except the esophagus seems to be much more sensitive.  I have had an endoscopy (normal, no gastritis, no GERD, no H. Pylori), barium swallow (normal), 24 hr PH (normal), ultrasound (normal), ejection fraction test (I was a 13 and have since had my gallbladder removed).  Suffice it to say I am disappointed that the GB removal did not fix the situation.  Bowel movements are slightly irregular, but still daily, just feel like I have incomplete evacuation.  Always pretty sticky if not loose.  Sometimes fatty & sometimes with mucous.

My question is could this be gastritis/H. Pylori?  The swallowing and abdominal distress seems to fit the profile...

Could they have missed it with m endoscopy 9 months ago?

Blood tests were sent to the lab testing for H. Pylori & Celiac disease.  Any thoughts?

[Quail1]

Sounds similar to my situation, read my blog H Pylori and C Dif complications.  I was diagnosed with H Pylori in 2007, was treated for it but I think now it is returning.  Waiting on test results now.

[hpylori959]

Helicobacter pylori is most likely acquired by eating contaminated food or water and through person-to-person contact. It is believed that most people become infected in childhood.  
Source: http://www.helicobacterpyloritest.com