your gestational age
according to lmp is almost corresponding to ultrasound wise gestational age,
usually fetal pole will be visualized at around 5 weeks of gestation, so no need to worry,
you just wait for one more week and undergo ultrasound preferably trans vaginal which will find out the fetal pole,
as you had previous miscarriage
better to be under protection of progesterone
with your doctor's advice and also continue folic acid
and other multi viatmin and mineral tablets.