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is a common problem in pregnancy
;excess of vomiting can cause dehrdration leading to fatigue;tiredness
.Please keep on taking the medicines regularly for vomiting if prescribed by your doctor.Drink enough of water so that you don't get dehydrated if required you can also take electrolyte powder with water ;it will reduce tiredness.These symptoms last for few months then subside please bear with it ;if you have any trouble please consult your Gynaec for guidance.
All the best.