Felt stomach being compressed/swollen when woke up in the morning or middle of night for contd 2-3 days. Cld it be somatic or sth serious?

Yes and Yes. There are lots of reasons for abdominal discomfort & bloating, & not all of them are due to the GI tract. Even "functional" syndromes may be present without underlying "disease." however psbo (paralyzed gut) due to metabolic & inflammatory conditions nearby (like an untreated infection of the urinary tract)must be considered & addressed. Check with your doctor for examination & treatment options.