Hi, I'm 22 weeks pregnant with 6th child, (last 2 born prem at 30 weeks) I'm feeling faint all time (low blood pressure) stomach pains in lower left side, sharp pain in "bits" sometimes and now vomiting dark green black sick, on empty stomach. What's wrong with me, I drink lots of fluids so its not that, worried as more things keep going wrong with me the further into the pregnancy I get