Thank you for expressing your concerns to us.
Your TVS report is "normal". It means that no organic causes of "not having periods" are present. One of the very important causes that your doctor might have had in mind is "ectopic pregnancy" (pregnancy in an abnormal location), but the TVS excludes that possibility. Other causes are mentioned in the report, such as SOL (i.e tumour) and infection. These are also not present.
That leaves us with causes that are known as "functional". Are you / have you been taking any medication on a regular basis? Do you have a coexisting disorder (eg hormonal
imbalance)? Are you going through a lot of stress? Have you recently started / stopped contraceptive
pills? These (and similar) factors may be hampering with the normal physiological process of menstruation
. Once your doctor sees the report, he / she would be looking to set such matters right, so that you can continue to have the normal natural periods.
To sum up, you shouldn't worry at all. Let your doctor do that and suggest the remedy to you.
Smile. Cheer up. Be well.