Greetings from your Physician. Thanks for consulting on the best health consult website. Well, the issue of diarrhea and vomiting is very common as there are more chances of infection during pregnancy including gastrointestinal tarct infections. Same is the case with you. It will be cured soon. For diarrhea and loose motions take a healthy diet and add Psyllium in regular routine. We have seen it effective even for Fecal Incontinence. You will get regular stools soon. For vomiting you need to take EnVePe tablet and if there is a need for prescription, you may need to consult a local area physician for that. Keeping a good balance of fluids and electrolytes is important too and for that you need to keep taking plenty of fluids and Pedilyte. Also get your blood pressure checked on regular prenatal visits as there are chances for hypertensioin and needs to be taken care of timely. Your weakness is due to loss of fluids in diarrhea and depletion of electrolytes too. You will feel energetic with the above suggestions and plan of action. You can contact back to us at this website anytime for help. We will be with you for treatment. Healthiest Regards and wishes!