Is it okay to masturbate while pregnant?

Is it okay to masturbate with a Rabbit (sex toy) while pregnant? I'm only about 4 weeks and for some reason I have a sex drive now that I'm pregnant (weird because I RARELY have one unless I'm about to start my period lol). Is it okay to do so? Now I'm scared I hurt the baby... I know they say orgasm can help start labor so can it cause miscarriage?