Early Pregnancy Disability Leave...?

I'm 8 weeks pregnant, and I have morning, noon, & night sickness ALL the time. I'm physically throwing up 8-12 times per day, with little pre-warning. With both of my last pregnancies, I endured this ALL 9 months! It did not end after the first trimester. I almost lost my job, for the amount of work I missed during my other 2 pregnancies.

I have seen my OB/GYN regarding the constant nausea and throwing up. Can I get CA State Disability, for this condition? Will/should my doctor be willing to certify the SDI form for Disability Benefits. My doctor in the past put me on disability for the last 3-4 weeks of pregnancy. Any advice will be greatly appreciated, especially if any other woman has been able to successfully receive SDI while in the first trimester of pregnancy.