Anxiety is not unusual. Meaning you are by no means alone.

The best book I have ever read on brain function is by Dr Daniel Amen as he addresses many areas of the brain that might need support.

Anxiety is one of the chapters. He provides a detailed description of what is going on, and many examples. He ties it all to ADD, so unless that is in the picture look at the supplements he lists to reduce anxiety. It can be as simple as a lack of a nutrient, or less than your body requires, so the solution might be a OTC supplement.

Worked for my son.

Book is about $20 paperback Healing ADD. He has other books as well that might be useful to you.