hello, You are carrying 28-30 wk pregnancy according to LMP and 26 wk by USG,described as late conception. Actually 2 doses of Dexamethasone/ Betamethasone are given 12 hrs apart after 28 wk of gestation for better lung maturity and prevention of distress during birth. Consult with your doctor regarding this. Also repeat the USG scan after 4 wk for assessment of fetal growth & development and to rule out IUGR baby or small for date. Take protein rich diet,continue Iron/calcium supplements,do periodic check up,avoid stress and need adequate rest in left lateral position. Be well.