Thanks for posting your query.
With the available described symptoms, there appears to be possibility of premenstrual tension or fecolith impaction
Palpable mass could be fecoliths which gets disappeared after passing stools.
You should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up.
You should also go for complete blood count
, MRI scan abdomen, thyroid
profile, blood sugar, x ray abdomen and serum electrolytes.
Meanwhile, you should take proton pump
inhibitors along with prokinetics for relief of your symptoms.
You should also take plenty of water and perform increased physical activity.
Avoid oily and spicy food, tomatoes, citrus fruits, excessive tea & coffee, chocolates.
Take soft diet
along with yogurt.
Dr. Mayank Bhargava