Hi thanks for your question
Your 30 week pregnant and complain of abdominal fullness and bloating.
the movement of the bowel are decreased due to decreaed peristalsis
It is due to hormonal
changes of pregnancy
Stomach emptying time is decreased and food remains in stomach for prolonged time .
This stasis of food in stomach causes fullness .
Stasis of food in intestine gives rise to bloating.
Anaenia can contributes to indigestion
Your advised to take frequent small meal,
you can also discuss your problems with your gynaecologist.
Hope I answered your question