I appreciate your query.
You should consult a gynecologist at the earliest to know about your scanty menstrual periods.
Also, your stomach cramps
could point to a gastrointestinal infection
, please consult a gastrointestinal specialist in order to rule out stomach cramps.
Your drowsiness, sleepiness and scanty menstrual periods could be due to thyroid disorder
, you need to get yourself tested, particularly if you have constipation
, lethargy, unexplained weight gain.
Sometimes, anemia also makes you feel weak and sleepy and leads to decreased menstrual bleeding.
Please consult a specialist in order to have a detailed diagnosis.