Did you get any kind of carbohydrates? Protein doesn't do much after a workout without carbohydrates.
And have you eaten enough before training?
It takes time before you stomach digest everything, if you eat prior a training, just make sure there is enough time between meal and training -> about 1,5 to two hours, and don't fill it up, you won't be able to train anymore,
the energy will be released during and after training.