My 35 Year Old Disabled Daughter Has Suddenly Developed Gas,

My 35 year old disabled daughter has suddenly developed gas, she's been belching a lot for a couple of days now. Loud gassy belches. I think she has a cold coming on. Drooling, red nose some coughing and she's not eating nor drinking very much. I'm pushing Power Aide as much as I can. She's non verbal. When we noticed it I asked her where it hurt she pointed to her chest. We can't always rely on where she points to.