thanks for using Health Care magic .
I would be pleased to answer your question
Vaccine ( Yellow Fever
) has no effects on the menstrual cycle.
is seen following any vaccination
. A common side effect following any vaccine is mild fever , dizziness , fatigue.
I would suggest you should meet a Gynecologist to look for other issues related to the mentrual cycle .You can also get a urinary pregnancy
test done in case if you suspect that .
Thanks and take Care .