vomitings are common in pregnancy
but your findings are suggesting the possibility of gastroenteritis
may be because of some food you have taken, other symptoms may be because of the toxins released from the organisms causing gastroenteritis,
vomiting might have increased the intra abdominal pressure leading to spotting from vagina,
as sometimes these changes can lead to premature uterine contractions which can further lead to miscarriage
, better to once get examined and take treatment.