Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Whitish or clay color stools sometimes may indicate problems related to gallbladder or liver. As any problem in pregnancy should be carefully treated, better to consult your gynecologist once, get examined and go for investigations like liver function tests, ultrasound abdomen and pelvis. If needed you may need to go to a Gastroenterologist. With clinical examination and necessary investigations the possibilities of your problem can be identified and treatment can be taken accordingly. If there is no major problem sporlac sachets like lactogen sporogenes containing can help in decreasing the symptoms. Antibiotics like cefixime is safe in pregnancy. Along with u can use any one antacid you mentioned. Hope I have answered your query. Let me know if I can assist you further.