hi read your query first and foremost dont worry about the nutrition of the baby the placenta between you and the baby makes sure that the baby is not deprived having said that i would caution too much dehydration since that could reduce the protective fluid bag around your baby now for your stool consistency you are pregnant and so i would prefer to avoid antibiotics as far as possible i would there fore suggest you to increase your fluid intake and try some probiotics that are locally available try a diet low in milk and proteins for a few days if all this helps, we will have successfully avoided the antibiotics and antidiarrhoeals of course plenty of fluids with ors once you get better hematinics, vit D and calcium supplementation can be started avoid them for now if you are on them iron in supplements can cause gi problems including stool problems i hope that answers and helps you best of luck