I will try to make this short and still understandable.  About a year and a half ago I woke up in the middle of the night with the most gut wretching pain, it had me doubled over.  It lasted all day and was accompanied by a fever and severe diahrrea, intense bloating and gas.  It happened again a few months later but to a lesser degree, still accompanied by fever, diahrrea, bloating and gas.  Then it has happened every few months,to a lesser degree, sometimes only lasting a few hours, but the "fever" symptoms seemed to go away.  Then the other day i wasnt feeling very good, didnt have the gut wretching pain, but instead a dull gnawing ache, varying in intensity, accompanied by hot flushes and i was clammy feeling for a bit and also by diahrrea and severe bloating, it felt like trapped gas to me but i just couldnt burp enough to make myself feel better.  That dull gnawing feeling has stayed for two days now and is just annoying more than hurtful. My stomach feels rock hard at times, even my husband noticed.  I am 26yr, white female, overweight and i tend to have diarrhea on a regular basis depending on my diet and stress and this holds true to all the females in my family.  Lately my bowel movements have been yellow in color (what does that mean?) I may not be getting enough iron as i do not eat red meat or mushrooms (maybe thats the reason) and sometimes my bowel movements seem to have very dark bits in them, also my food is usually not all the way broken down and i can tell what i ate. Please help. thank you