Not having your period for more than 12 days and having a bloated stomach may be due to pregnancy, indigestion, improper diet and other reasons. 1. Pregnancy: For women who usually have regular menstrual cycles and do not take effective contraception during sex, delayed menstruation may be due to pregnancy, but the progesterone secreted by the body will increase after pregnancy, resulting in weakening of gastric dynamics, which will lead to bloating symptoms. 2. Indigestion: some women suffer from gastritis, gastric ulcer and other diseases, may affect the gastrointestinal tract, resulting in indigestion, so that the food can not be digested and absorbed in the gastrointestinal tract in a timely manner, so the symptoms of flatulence may also occur. 3. Improper diet: Some women eat too much gas-producing food, which can also easily lead to flatulence. It is recommended to go to the hospital in time, after the doctor’s interview, combined with the woman’s own condition and other symptoms, choose the appropriate examination program, to clarify the specific causes of the disease and then targeted treatment.