I agree with everyone else, you should see your doctor.
I too am very sensitive to most drugs.
Have you tried ginger?
Ginger has been found effective in multiple studies for treating nausea caused by seasickness, morning sickness and chemotherapy. Ginger is a safe remedy for nausea relief during pregnancy.
Here is a link to info about it on the University of Maryland Medical center.
http://www.umm.edu/altmed/articles/ginger-000246.htm
Good luck and please let us know what your doctor has to say.
MsL