Awful Morning Sickness

I am 8 weeks pregnant with my second child and suffering from awful morning sickness. Including nausea, sickness, headaches, dizziness, constantly feeling sick and acid reflux! I've tried anti sickness bracelets, ginger nuts, sipping water, peppermints. And nothing is helping to ease it. Apart from dandelion and burdock! Well it's worked 3 times?! Does anyone have any remedies thats worked for them? Please let me know. X