No sir, the problem is glutamine pathway induction of glutamate excess.
In the GI tract, it signals for excess CCK release, and this depresses appetite. Glutamate and its receptors, such as NMDA have been shown to play a critical role in the neurotransmitter imbalances behind mental depression. Glutamate is also an excitatory neurotransmitter in brain - it is likely to play a role in the mood swings you report as a side effect of using NOS (nitric oxide synthase) inducers - the supps you report using that gave these negative side effects.
In case you think I am bullshitting you, your headache is directly caused by low taurine in brain and excess NMDA receptor activation by glutamate (normally controlled by taurine and GABA - you are low in both of these counter excitatory compounds in both brain and liver). You also have upperbody tension, particularly in the chest, shoulders, neck and jaw, when you use these NO inducer supplements.
Avoid using excessive glutamine, orthinine, arginine, and citrulline supplements, for the same reasons.
Begin supplementing with 0.5-1 gram taurine, 2-4 times per day. Use magnesium citrate, 1/4 tsp couple times a day. Also use GABA, last half of the day, 1/4 tsp - reduce if this makes you feel excited (shouldn't, but every once in a while, clients report being very sensitive to GABA supplementation when their own endogenous production is very low).
I predict a high probability for the onset of gastric reflux or IBS in your future. Avoid use of insulin boosting supplements, including dextrose in your whey, you can and may develop insulin resistance as well. As bran (oat, barley, rice bran) fiber to whey drinks. Do not use glutamine boosted whey.
Almost an assured point: you have unusual fermentation micro-organisms in your colon. You also lack adequate soluble and insoluble fiber in your diet; one clearly helps promote the other (related condition, glutamate sensitivity and Gi disorders).
The use of the bran (couple tablespoons) in your whey will help re-establish normal gut bacteria. To this, add at least 3 servings of fiberous veggies to your daily intake of fiber.
Secondary complications: joint, skin inflammation.
Don't ask how I know this; its a long, long story.