You know that protein leeches calcium from the body and can cause bone problems later in life, right?
The actual amount of protein you need in a day, if you're most interested in your health, is around 2oz from all sources. You're talking about
supplementing your normal diet with that much again! Unless you eat no protein in the rest of your diet (and if that's the case, then you're really not taking your health very seriously
), you're going to be consuming far more protein than you need. You only need extra protein if you're specifically seeking to build muscle mass, or if you're particularly active. 4 - 6 casual gym sessions a week probably doesn't qualify.
if you're feeling tired and not sleeping well, I'd look at dehydration and overall diet, particularly vitamin intake and daily calories, before worrying about protein. The chances that you're not getting enough protein and very slim indeed...