thanks stephenCastlecrag that was a big help.
I am not a doctor. Since you are HbsAg negative, but AntiHBc positive, this mostly likely means you had Hepatitis B infection previously but had fully recovered.
I don't see any need for you to receive HBIG, nor for your baby to receive HBIG immediately after birth. Of course your baby, like every baby, should receive the first dose of the 3 dose HBV vaccine immediately after birth and complete the whole vaccine series.
You should discuss all this with your doctors.
Congratulations and all the best.