 [ Symptoms ] what does black stool mean ulcer history passing out removal of 25 of my stomach i was recently diagnosed with fibromyalgia and pretty much have pain everywhere had a bad reaction to gabapentin and have had no medications except depressionanxiety since wednesday dr is too busy and it is now sunday no appetite have to force myself to eat nothing tastes right drinking a lot of water constantly thirsty pooping is painful very dark almost grassy like from mashed potatoes to watery suggestions [ Disease ] hi you were exposed to to extreme stress and some blood lose my opinion is these are normal effects to what you experienced i recommend cbc test to check your haemoglobin levels good luck