After a coffee enema you should feel more perky or energized (but not jittery) than sleepy. Are you doing the coffee enemas in the morning or evening?
I do mine first thing in the morning. I prepare everything the night before so I don't forget anything being somewhat not with it at that hour.
What are you using? After much experimenting, I settled on a heaping quarter cup of grounds in 40 ounces of water, boiled and then permitted to settle out so I end up with about a quart of coffee solution. I heat that to about 103F and take it slowly using a retention nozzle and retain for twenty minutes. Sometimes there's cramping tp deal with and other times it is like nothing at all.