I'm pregnant and my little sister has lice!

My younger sister sat in my bed while we talked since I'm so lazy and pregnant these days.. now me and my fiance have started to itch and found out that my mother found lice in my sisters hair... I'm 34 weeks pregnant. Should I just call a doctor to see if they can give me a prescription or have any of you gotten rid of it naturally? Super embarrassing but it happens with kids that go spend the night elsewhere.