AST And ALT Elevated At Pregnant.

I’m 28 years old, 158 cm and 51 kg. I am 4 months pregnant . I take a examination at this Monday (16 weeks pregnant) but the blood test result didn’t sound very good: The 2 figures were abnormal: AST = 79 (reference range = 0-40 U/L) ALT = 110 (reference range = 0-65 U/L). The Hepatitis test were gave negative result and I had the Hepatitis A vaccination 1 years ago. Just for you to have a complete picture, the other figures were seems completely normal: TBIL = 8.0 (reference range = 2.0-18 Umol /L) DBIL=1.5 (reference range = 0-6.0 Umol/L) TotalProtein = 75.7 (reference range = 64-83 g/L) Albumin =38.2 (reference range = 34-50 g/L) TBA =2.3 (reference range = 0-12 umol/L) I also have ultrasonography on Abdomen and it shown the baby is OK. Is the AST and ALT figures are normal in my stage ? Should I take medicine care now. I am confused. So could you please give me some suggestions.