Hallow Dear,
Please do not be skeptic about
ultrasonography scans. Scan is a very useful tool to asses the integrity, normalcy, growth of the foetus. And it is safe too.
You had your last menstrual cycle on 30th April. In July, the
pregnancy should have been 3 months; however, the scan is showing it to be only 5 weeks. This discrepancy could be due to mistaken dates or non-viable baby. Usually, if it is a non-viable baby, the
gestational sac would have shown corrugated or irregular margins.
The doctors are suspecting the baby to be non-viable, hence a repeat san has been advised to you. If it confirms the diagnosis of non-viable baby, you will have to undergo termination of pregnancy.
Please do not loose your heart. Even if this pregnancy is wasted, you can have a normal baby next time.
I am sure, you have got your query resolved.