Our expert says:
I presume you mean that it was 21 days form the start of your period till the start of the next one. This is normal. 28 days is the average.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.