This is Dr Basu, experienced Internal Medicine Specialist.
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Pregnancy is possible given the light brown discharge currently.
However pregnancy test may not be positive so soon.
May need to wait at least a week.
Another more likely possibility can be natural variation in hormone levels in the body causing erratic bleeding pattern sometimes.
Small uterine fibroid tumor, cervical polyp can also cause such type bleeding.
Thyroid gland disorder also should be considered.
These considerations are if your pregnancy test is negative, and you get similar pattern of bleeding next month also.
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