Hi, Welcome to HCM, I am Dr. Das
First of all Cardiac activity and fetal pole
get detected by USG normally at 6 weeks. and heart rate
can be measured at 10th week. But these have variations of 5days.
As you are pregnant for 5 weeks and 6 days then go for USG after 7 days.
you did not give your complete obstretic history. As you are RH- during the previous miscarriage
did you took any Immunoglobulin for RH? If not, it can hamper your pregnancy
As per as age is concerned , yes, it is high risk fator.