3 doctors weighed in:
My period comes on every 3 weeks for 3 days. I get severe cramps, headaches, and diarrhea.
3 doctors weighed in

Dr. Robert Kwok
Pediatrics
2 doctors agree
In brief: Ob-Gyn can evaluate
Menstrual cycles are usually 28 days, but a few women have normal 21-day cycles.
However, severe cramps are not normal, so an ob-gyn doctor can evaluate to see what the problem is, and to see why there is also diarrhea and headaches. Severe menstrual pain may be endometriosis, which causes some bleeding inside the abdomen during a woman's periods, and needs medical treatment.

In brief: Ob-Gyn can evaluate
Menstrual cycles are usually 28 days, but a few women have normal 21-day cycles.
However, severe cramps are not normal, so an ob-gyn doctor can evaluate to see what the problem is, and to see why there is also diarrhea and headaches. Severe menstrual pain may be endometriosis, which causes some bleeding inside the abdomen during a woman's periods, and needs medical treatment.
Dr. Robert Kwok
Dr. Robert Kwok
Thank
Get help from a real doctor now
Dr. Jonathan Jassey
Board Certified, Pediatrics
13 years in practice
1M people helped
Continue
108,000 doctors available
Read more answers from doctors