Common causes are non-addictive stimulants like Strattera, and odd reactions to nerve pain relievers like Gabapentin, Pregabalin
, cymbalta, and a few other newer medications. Diet pills, mood enhancers, or energy booster supplements could also contain ingredients
in concentrations to cause such effects. Call your doctor before discontinuing any medications or strong supplements. I hope you feel better, and hopefully I helped point you in the right direction.