See http://www.thehumansideoflyme.net/viewarticle.php?aid=62 for all the havoc Lyme can wreak on the gut... Sudden onset is part of it, too. I went to bed able to eat, woke up the next morning unable to swallow anything (solid or liquid)...this was last June, and I still can't swallow much without choking on it. And 2 LLMD's say it's Lyme and Bartonella-related.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), IV Milk Thistle, probiotics.