Echinacea is suggested as not safe during pregnancy as it could stimulate the uterus and cause premature labour or miscarriage. Other people say not to take it as during pregnancy your immune system changes to accomodate the growing baby and Echinacea could interfere with that. HOWEVER, there are studies that show it to be safe during pregnancy and any ill effects on pregnancy are anecdotal and after repeated exposure. Please try not to worry (easier said than done I know) there wouldn't be a very high dose in the juice you are drinking. There are no studies that prove that Echinacea is harmful in pregnancy and I'm sure the small amount that you drank wouldn't do any harm.