I personally suffer from widespread Stage IV endometriosis and mine has never appeared this way. The left side pain isn't necessarily from endometriosis on the colon, it could anywhere in there. The (cherry) angioma would usually not have anything to do with the colon, but angiomas can occur due to a hormonal imbalance (from the endometriosis.)
It tends to act as a upper when it is truly a downer
A. think of the Atikins diet which alows for no carbs. That is something that would be hard to stick to