Thanks for consulting us.
To be factual, there is no specific time one can tell you, to be necessary between a fetal demise & its presentation. Sometimes it may present on the same day by bleeding & / or pain sometimes it is just an ultrasound
diagnosis with no clinical sign.
I suggest you should try to take these things out of your mind & try to think positively.
I recommend you to book yourself with a consultant obstetrician in your area so that best antenatal care can be offered to you. Vomiting
is common in Ist trimester due to the effects of hormones on your gut. Its Color & texture may differ depending on your stomach contents. Please don't take it as a bad prognostic sign rather it is commonly considered to be a sign of an ongoing pregnancy
. It has nothing to do with the fetus in your uterus
Wish you best of luck & a cute, healthy baby.