What does your workout entail, and what's in the protein powder? You also say you lost muscle, I think -- if you're losing muscle and you're still active, you need to see a doctor.
did you change your diet or something? is there any change in workout? If you are loosing muscle, without any change in your diet, lifestyle and workout, you should check your blood tests. Make sure you have no ailments
When you reply to Paxiled question then I might give my opinion.