Refusing glucose test?

I am 20weeks. And I know I'll have to take the glucose test soon. Can I refuse it? I gag and throw up with everything still and I know I will not be able to handle that syrup. This is my 4th baby and I have never had any issues with morning sickness or food aversions. Until this one. It's bad. Honestly I'd rather just test my blood sugars for my entire pregnancy.