thank you for your query.
As it was not a normal period, there could be one of many possibilities.
Very rightly it could be an early pregnancy
It could also be a miscarriage
It could be an ectopic pregnancy.
Other differentials include stress, anxiety, weight changes, travelling, thyroid disorders, polycystic ovaries
, high prolactin
levels or taking hormonal medication.
The only way to confirm the diagnosis is by visiting a gynecologist for appropriate evaluation