Hello,
I have gone through your query and understand your concern.
As you had the menstrual period recently, then you might not be pregnant.
That brown dark light flow is nothing but a old blood retained in the uterus.
All the symptoms like Nausea,
Frequent urination, circles around nipples,
tiredness, weakness etc may be due to
hormonal changes.
These symptoms are common in perimenopausal stage.
Further as you had Post
tubal ligation, you could not be pregnant.
YOu have to understand that reaching perimenopause is normal in stages of life and it does not need any treatment.
If these symptoms are bothersome and worsens, you need to consult your Gynecologist and she may start
hormone therapy.
Hope this helps.
Please write back for further queries.
Wishing you good health.