Hello dear,
I understand your concern.
In my opinion there are various causes for
bleeding during pregnancy like :-
1)Thyroid abnormalities .
2)
Progesterone insufficiency.
3)Abnormal pregnancy like
miscarriage or ectopic pregnancy.
4)Bleeding from cervix.
etc.
So all the above causes should be ruled out by physical examination and necessary investigations.
Ultrasound helps to know the well being of fetus.
Thyroid profile helps to rule out any thyroid abnormalities.
As you are just 13 days pregnancy its very early.So don't worry with appropriate medications it might get normal.
Nothing to worry as in some cases even though with the presence of bleeding everything will be normal and pregnancy continues till term and have good outcome.
Relax.Avoid physical stress and intercourse.
Take
folic acid and progesterone supplements.
Once the cause is treated it will subside in most of the times.
Hope this helps .
Best regards...Dr.Srilatha