Hello,
Thanks for writing in. Sorry about the delay.
It sounds like your abdomen has been distended for some time and there is a bad odor but not fishy odor...and no problem with
constipation.
The question is what could this be and is it related to severe periods.
A thorough history and physical including xrays of the admomen and ultrasound of the pelvis would be in order...or abdominal/pelvic CT.
Possible diagnosis:
small bowel obstruction...cecal volvus (twisting of the intestine)
IBS
Inflammatory bowel disease.
All the pelvic organ disorders (eg PID,
endometriosis,
PCOS).
I think the first thing to rule out is a volvulus and can be done so with a CT scan.
Take care and Keep us posted.