Is there a connection between sibo and mastocytosis? can you recommend a specialist in portland or who is highly qualified to treat masto or sibo?

Be VERY careful: "Small intestinal bacterial overgrowth" is usually a "pop" diagnosis made by non-evidence-based practitioners as an explanation for everything. You'll be offered a host of treatments but will never be cured or feel well. "Mastocytosis" may be another bogus "pop" call. Real mastocytosis is rare, but extremely serious if present, and you need to be seen by a competent hematologist / oncologist.