Oh, horrible. DD and I got scabies (though DH escaped somehow) when she was about 12 months old. I used the perscription pesticide, plus neem soap and shampoo. I think neem is the best natural scabicide, but it's definitely not recommended in pregnancy. Honestly, you might have to use the perscription stuff. Don't forget to wash sheets, clothes, diapers etc. in hot water every morning (scabies most active at night) and put things that can't be washed on hot, which might be exposed, into plastic bags for a week (or was it only three days?).
Good luck with it. Remember, it itches for a week or so even after the bugs are gone.