Since I am a gynecologist, I will deal with the period issue, and you can certainly post in the gastroenterology forum about your abdominal pain and bowel problems.
Normal menstrual periods last no more than 7-8 days. So by definition yours are abnormal. If you were my patient, I would do a complete exam and pap smear. I would also do an ultrasound. I would want to rule out polyps of cervix or uterine cavity.
Polyps are common and can cause irregular, heavy and prolonged bleeding.
If you don't have polyps, the other things that could cause similar symptoms would be fibroids, hyperplasia or endometriosis/adenomyosis.
If you have finished having children, ( and depending on what the tests reveal) you might want to consider a procedure called an endometrial ablation which would very likely cut down the bleeding.
If you were my patient, and you did want more children, I would probably start you on an oral contraceptive pill ( if no contraindications) after a 14 day course of progesterone.
One more thing to mention--I ALWAYS recommend a pregnancy test FIRST.
i have been releasing brown discharge before and after periods for about 4 months now, back in april i didnt get my period at all. i've been also experiencing lower back pains and i havent been eating much either. i had 3 abortions before, can this have something to do with it?