Dear lybrate user,
from taking protein powder, you are suffering from headache that means that powder is not digested by your body.... that leads to gastritis, indigestion and leads to headache. If you are not active in any physical activity like gym, swimming,etc...then difinitely this will disturb your digetion and For proper digestion you have to do some active physical exertion for proper digestion, absorption and assimilation of whey powder. And for permanent improvement of your digestion you should take homoeopathic medicines and you may consult me online