You should also get an USG to rule out any gall stones, which can give you a constant feeling of Gastritis
Answer to Your questions 1)Yes, H pylori can be detected by stool test, no matter whether
2) No, taking pan 40 together with sucrafil/gaviscon will leave pan 40 ineffective
Next Steps
If H pylori is positive, then a proper course is must to eradicate the organism
Health Tips
Already given