These symptoms can also he a manifestation of histamine intolerance. If your enzymes that break down histamines (diamine oxidase - DAO or histamine methyltransferase - HMT) are faulty it will be a problem.

High histamines give me the opposite of the effect of taking anti-histamines, which normally make you drowsy.

You would be amazed how many foods are high in histamines. Basically anything that is really flavoursome. And many additives either inhibit histamine breakdown or promote release from the mast cells.

Not to mention MCAS mast cell activation syndrome.