Girls, hello everyone, I'm currently 14 weeks pregnant and still feel …

Girls, hello everyone, I'm currently 14 weeks pregnant and still feel nauseous in the mornings, sometimes even to the point of vomiting. My blood pressure drops frequently, possibly due to the weather, and a couple of times I've lost consciousness. This hasn't happened in my first pregnancy. How long can morning sickness last and is this condition normal? Thank you so much ?