Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
It is possible for the tubes to sometimes get recanalised and
pregnancy to occur. But this is very rare. However if your periods were very regular then I suggest that you get a pregnancy test done 7-10 days after the missed period to rule-out pregnancy.
Common causes of pregnancy like symptoms (feeling sleepy, weakness,
vomiting etc) are peri
menopause or even menopause(most common), hormonal imbalances,ovarian cysts, Stress, rapid weight gain or
weight loss also cause similar complaints.
Menopause is life event in females life(typically between 40 to 50 years of
age) when she stops ovulation & hence her period stops permanently. Menopause or even onset of menopause (perimenopause) causes severe deficency of hormones & may cause these symptoms.
If the periods continue to be absent for more than a month despite a of negative pregnancy test then an evaluation by a gynecologist and further testing in the form of hormonal assay and
ultrasonography is advised.
Do not worry You would be fine
Hope this information helps