Hello Good Evening,
This is very tough task to do idea about that you are menopausal or not, without knowing your age.Vasectomy
has more success rate of sterilization
So there are very few chances to get conceive but not impossible.
Generally man can remain fertile for around 3-4 months after vasectomy but failure rate of this procedure is 1:2000 after this period, which is far less than tubectomy but not the zero.
can be a possibility, another is menopause
, depends on your age, and another is menstrual irregularities.
So you should go through a urine pregnancy test, then to a gynecologist.
Dr. Naresh Jain.