"All day" sickness

Allison
I'm 11+2 today. I've been very nauseous for about 6 weeks. This week starting Monday, I've been very way more nauseous than previously to the point that I've thrown up twice today. I read in one of my pregnancy books that the 11th week is the worst for morning sickness. Has anyone else expierenxed this? How long before it goes away completely?