usually not, if you are scared easy then no way. Pregnant women far enough along could also go into labor if scared. Its usually not advised to do anything while your pregnant that would cause a fast heartbeat, being jumpy or shaking. If you are only a month or two along and not easily spooked then you may want to try it but I would play it safe.
The effects of Botox Cosmetic on pregnancy are not known, and it is recommended that pregnant women and women who plan to become pregnant should not receive Botox Cosmetic treatments. It is recommended that women in these situations should wait until after their pregnancy before receiving Botox Cosmetic treatments.