I had issues similar to this twice. The first time when i was in college, i consulted a doctor. He diagonised vitamin deficiency due to poor food at hostel. T

I had issues similar to this twice. The first time when i was in college, i consulted a doctor. He diagonised vitamin deficiency due to poor food at hostel. The vitamin supplements helped a lot. It felt like a switch was flipped on. Another time was quite recently. I had healthy diet and exercise almost everyday. Yet i often felt drained. Adding a yoga session in the morning made a huge difference. Around that time, i also stopping sitting for long periods and moved a lot more. I am trying a make shift standing desk. Maybe that helped too.