beets are good for liver and kidneys, so they help with bowels and water retention.
probiotics will help the intestines, esp if you are constipated. prunes help too!
nettle tea is full of minerals that support the baby's growth and also acts as a kidney tonic to flush water. it is often used at the end of pregnancy for swelling.
digestive enzymes will help if your food isn't digesting well after you eat and the bloating is mostly after meals.
i'm a naturopathic...