Congratulations to you and your baby.
Viread, like Entecavir, is very good at suppressing the replication of the HBV virus, hence reduction of the serum hbvdna(viral load). Generally with reduction of hbvdna, ALT should be normalized.ALT can be elevated for other reasons, such as your immune system fighting the virus. So to answer your question, you should measure your viral load to see whether it is increasing or decreasing. Your situation is quite common and you should be fine.