I was taking medication for acidity but after...

 Causes and treatment of abdominal pain:

The most common causes  of middle abdominal pain in pregnancy are related to the hepatobliary diseases mainly gallbladder stones and gastritis , gall bladder stones resulting from the generalized stasis seen in pregnancies at hepatobiliary systems resulting in stones formation, treatment of such case will depends on the symptoms, if its severe and associated with every meal it should be removed and best time is in the second trimester of your pregnancy, otherwise it can be observed with medical treatment

Gastritis resulting from hormonal changes in pregnancy and the enlarging uterus, treatment should focus mainly on reducing the gastric acid by medication such which you’ve said.

Both of the conditions usually recovered after delivery in most cases.

Diagnosis:

By visiting factors for history and physical exam and doing the investigation like CBC and Chemistry profile in addition to US of abdominal with gastroscopy for stomach

Signs and symptoms:

• Abdominal paid
• Nausea
• Vomiting
• Gastritis
• Heartburn
• Diarrhea
• Others

Advice

Visiting doctor.