Yes, @talljasperman – you’ve had other questions about orthostatic hypotension before. It’s fairly common. Did you ever see a physician about it?
Since you describe the sensation as your “brain struggling for nutrition”, you may be onto something regarding your dietary needs. Dehydration can cause a lot of problems and will exacerbate almost all health problems and symptoms, so make sure you drink plenty of water or other caffeine-free beverages – about 2 liters per day. If you have a hard time buying or storing healthier foods, perhaps you could try adding a daily multi-vitamin to your morning routine to see if that helps.
Poor sleep patterns can also contribute to health problems, so try to get yourself into a routine. Getting some exercise after dinner – even if it’s just walking around the block or going up and down the stairs a few times – can help you sleep better. Then make a bedtime grooming ritual, such as showering or washing your face, then brushing your teeth at the same time every night. Dim the light sources a bit, and ideally one should stop looking at glowing screens at least a half-hour before sleep time. Reading a book or magazine, or doing puzzles on paper are good for winding down at the end of the day. Also make a point to get up at about the same time every day. Studies have shown that a consistent sleep/wake schedule has many benefits for mood and alertness, as well as overall well-being.