Grrrrrr! On our 4th GP now. Son has Gastritis after having Endoscopy test in November 16. He's got symptoms such as sighs memory fog, bloated stomach. Been taking ranitidine and buscopan which helps his symptoms. Was told to use Fodmap diet, Gp now thinks it's ibs. I've asked Gp to do IF blood Test which will be done next week. GPC test was negative. Coeliac was negative. Last blood test results : FBC 141g/L ref range 135-175. Serum B12 174ng/L ref range 130-180. I discussed results on low side of satisfactory , but GP dismissive. She's now referred back to Gastro at Hospital. I also discussed MMA test, but GP can't offer that test. Feel like banging my head against a brick wall. Frustrated!!!! Any advice welcome .