Hi, thanks for using healthcare magic
When periods occur at intervals less than 21 days, it is called polymenorrhea.
This can occur due to different causes such as :stress
, chronic pelvic inflammation, sexually transmitted infections, hormonal
The treatment depends on the cause.
You can consider monitoring it to see if your cycle returns to normal.
If it does not then you may want to visit your doctor for an assessment.
I hope this helps