skythian,

You are putting too short a time interval between increases in effort. The Buffalo Protocol does not increase heart rate as fast as you are. Your expectations of improvement are also to short term minded. Expecting short term improvements, even if just from fish oil, is setting yourself up for anxiety. At 6 weeks, you are still very early in your recovery.

Regardless of your concussion recovery, I am concerned that you feel so sensitive to depression. If your goal is to get in the left seat of some heavy metal, you would be wise to get some understanding as to why you are so sensitive. I highly recommend reading the Vitamins sticky at the top. The brain health supplements regimen is also good at helping the brain tolerate stress and be more depression resistant. Antidepressant and anti-anxiety meds are a quick way to lose your 2nd Class or 1st Class medical certificate.