I have an ultrasound tomorrow only, not meeting doctor or ob yet. my question is will i still have to pee in cup? and if so, what if i don't want to

Pregnancy: You will probably be asked for a urine sample. But unless the doctor has reason to be concerned about drug use, this will only be for urinalysis, not drug screen. Urinalysis tests for color, cells, sugar, blood, etc to make sure you're healthy beginning your pregnancy. These things can change as pregnancy progresses, so baseline measures are needed.