I vomitted little blood and many dark brown liquid.I felt bad smell on my mouth,still feeling sore on my chest.do you know why?what should I do?i always thirsty,but I can not drink one cup.If I drink more,I want to vomit.Every day I vomit a lot,I fell very uncomfortable.it is only 7 weeks on my pregnancy now,I do not know how long it will lasting?what can I do?