“Can you take sleeping medicine while pregnant?”

I presume that "sleep problems" are a symptom of insomnia (difficulty falling and/or maintaining sleep). Insomnia has many potential causes, some of which are specific to pregnancy. In more general population anxiety, pain, depression, and acquired poor sleep behaviors account for most insomnia. Insomnia can often be addressed effectively without medication, and sedatives should not be taken if possible during pregnancy. I would strongly encourage discussing your complaints with a sleep specialist or with your obstetrician or perhaps both.

That is entirely up to your OB/GYN. OB physicians have different feelings about sleep medication’s while pregnant.