Lingering morning sickness

Do any of you still have morning sickness lasting into the second trimester? My first trimester was awful beginning in week 9. I've been on two rounds of Zofran to alleviate the severity of it. Now that my prescription has been out for a few days, the morning sickness is back. I was hoping the worst was over, but it doesn't look like it. I've tried all the home remedies with little result. It's so frustrating not being able to enjoy pregnancy!