12 was 5 days and still sick!

When will this end. I have maybe one good day.... once mid afternoon into the evening I get that motion sickness feeling and spend my time gagging or vomiting... anyone else have this issue this far along? I'm afraid this is going to continue. I take phenergen but it makes me sleepy. My dr told me she can prescribe zofran in the 2nd trimester, so I guess I'll give that a go... anyone see a difference between the 2 meds? I'm feeling a bit discouraged... I never had this issue with my other pregnancies.