an article from another pregnancy website
FLATULENCE
Flatulence is embarrassing at the best of times and is one of the conditions made worse by pregnancy. Gas buildup in the stomach and intestines is very uncomfortable - especially with so much pressure on all the internal organs - and can cause shortness of breath and palpitations. When the digestive tract expands this extra pressure can cause an angina type of pain which can be strong enough in some cases to be mistaken for a heart attack. When this gas buildup is expelled rather noisily this may be indigestion or may sometimes indicate something more serious, such as gallbladder problems, or even gallstones. But usually flatulence is functional - it is unrelated to any disease of the organs - and in pregnancy the most common cause is swallowing air while eating too quickly or gulping large quantities of air during the day. If you are eating foods which have previously upset your digestive system, such upset will only be made worse by your present condition. Carbohydrate foods fermenting in the large colon often cause flatulence and it can be helpful to avoid foods which contain a large proportion of starch and cellulose - peas, potatoes, pulses, carrots, and onions. Try not to swallow air and breathe through the nose if you can. If you feel like belching, do, because you don't want the extra pressure at this time, but be careful not to take in another gulp of air immediately afterwards.
There are three essential oils which are helpful in combatting flatulence and which can be taken during pregnancy - dill, fennel, and spearmint. You can use any one of these individually to make an oil for the abdomen or mix two of the three. Dilute a total of 30 drops of your chosen oil or comination of oils in 2 tablespoons vegetable oil and rub over the abdomen several times a day. Alternatively, spearmint can be taken internally - but only in very small amounts once a day. Dissolve 3 drops in a tablespoon of honey and keep this mixture to use when needed. Once a day, take half a teaspoon of this honey and spearmint oil mixture in a small glass of boiled, warm water, being careful to sip slowly and avoid taking in yet more air.