Thanks for your query.
At 45, chances of pregnancy
are quite low.
The changes are due to peri menopause
Also, a urine test is 97 % reliable in confirming pregnancy.
However, without examining you, starting Meprate
is not a good idea.
Clinical examination and a transvaginal ultrasound
would reveal the cause of your missed periods.
However, as you have already started meprate, you could expect a withdrawal bleed within the next 4 - 5 days.
PLease consult a gynecologist if you do not bleed within a week.