Hello,
Thanks for posting your query at DoctorSpring.com
I am Dr.R.K and I am pleased to assist you.
Distended stomach could be due to fat accumulation, fluid accumulation, increased gas or pregnancy.
Of these fat accumulation and pregnancy are ruled out.
To look for fluid accumulation , physical examination or an ultrasound scan of the abdomen have to be done.
There are different causes of fluid accumulation.
Increased gas could be due to poor digestion. This could occur due to causes like infection or diseases involving the digestive organs.
Since you had nausea and vomiting, increased gas due to infection is the most likely cause.
A stool test and an ultrasound scan of the abdomen may be done .
I hope that answers your query.
Let me know if I can assist you further.
Regards,
Dr.R.K.