A year or so ago, [redacted] thought he had restless leg syndrome. He talked to a psychiatrist about the symptoms (insomnia coupled with an urge to move or kick his legs when he'd lie down in bed) and the doctor said yes, that sounds like restless leg syndrome and prescribed an anti-anxiety medication for it, to be taken before bedtime. It helped but only somewhat. [Redacted] had noticed that the RLS cropped up around the same time that he had started running, and thought they might be somehow connected. Eventually it dawned on him that it wasn't the running itself, but the fact that he used an inhaler before he ran (since running aggravates his asthma). Inhalers contain stimulants. He stopped hitting the inhaler, and the RLS went away.
"Restless leg syndrome" turned out to be the equivalent of my IBS "diagnosis." Be wary of diagnoses that include the word "syndrome." Your nebulous syndrome may have a direct cause.