Excessive muscle burning

Any other changes recently in diet, activity levels, medications and/or other health issues (physical, psychological or otherwise)?

What is your diet like generally? How active are you?

My diet is usually an egg sandwich for breakfast, protein shake when I arrive to school. Leftover rice and meat with steamed broccoli for lunch. Same for dinner.

This is not exactly a Chinese Medicine idea, but from the looks of it you are probably having issues with low potassium which can both affect the heart beat and is a common cause of lower leg cramping, etc.

In general eating better to support your level of activity would be important, obviously. Specifically, staying better hydrated and perhaps trying to eat a banana or other high potassium food later in the day would be good.

In technical terms from a Chinese Medicine perspective you sound like you are kidney yin deficient (explore the kidney system with my “My Kidneys Are What?” article). If I’m right, you are more “tired and wired” (i.e. yin deficient) than truly tired (i.e. yang deficient). Accordingly taking herbal stimulants like ginseng, etc. will only make the causal conditions worse - even if you will feel marginally better energy wise.

Technically there are herbal formulas which could help you quite a bit, but you really should see someone locally to make sure the diagnosis is correct before going down that road. Liu wei di huang wan is the base for most of these issues, with many variant formulas to better suit each individual.