 [ Symptoms ] what problems can happen in my third trimester of pregnancy [ Disease ] any of these symptoms could be a sign that something is wrong with your pregnancy do not wait for your regular prenatal visit to talk about it call your doctor right away if you experience severe abdominal pain or cramps severe nausea or vomiting bleeding severe dizziness pain or burning during urination rapid weight gain more than 6 5 pounds per month or too little weight gain