What's wrong with me?

I'm 36 years old and a mother of 3 toddlers under 5 one of which is disabled. My stress level over the past 5 years to say has been incredible high is an understatement.
Here are my symptoms for 6 weeks to date: Loose stool, nausea, loss of appetite and weight..sx's are not constant,but do occur every day,  and I do not have any pain, cramping or reflux. I have a lot of upper bowel sounds. I stomach feels distended at times, as if I drank too much water..that uncomfortable feeling
I had an abdominal US and bloodwork both came back neg.
I would hate to have to go for an endoscopy or colonoscopy to have them tell me this is all stress related. Somebody please give me some sound advice please.