Constant nausea

Katie • Worship the living God. Married 9 years and have 3 beautiful girls.
Hey there,
Had constant nausea and some vomiting since about  5 weeks. Getting desperate for relief and feel like I've tried everything. Bragg's apple cider vinegar, lemons, unisom with b6 (per doctor). Only 6 1/2 weeks now. This is my third pregnancy and it was never this bad with the first two. Suggestions?