Good day, To start at the end of your question, No, there are no herbs likely to be useful here ( though there are many varieties on the market ) and I am always wary of remedies that brag about being "natural" ; unless you nibble on growing plants what you consume is not purely natural, and many very naturally occurring things are horrible and dangerous, including many awful poisons. If anything could possibly produce useful effects, it can also have side-effects and risks.
Now, I wish I knew what problems you were experiencing that led you to do to see your doctor. What you seem to be mentioning in your question, could be symptoms of anxiety, or side-effects of medicines, or caused by something else entirely.
Presumably the doctor having heard your initial complaints, decided these probably were caused by an anxiety disorder. That's a common condition. Stresam is a sensible treatment for anxiety to try, as it has few side-effects and does NOT have the risks of the too often used family of benzo drugs ( Valium, and many others) which can be habit forming and reduce concentration, among other problems. Many people find it suits them well.
Assuming that your doctor has ruled out any other health problem or physical illness, and is still concerned about anxiety, there are two good options. If one still wants to use medication, then the most widely recommended option would be to use drugs also used to treat depression ( even if you are not otherwise depressed ) and these include the two more recent drugs you mention.
The other option, well supported by good research, is to find someone able to provide a specific form of counselling called CBT ( Cognitive-Behaviour Therapy ) which is as effective as medication, and helps you regain control of your reactions to life, and your symptoms, and to revise unhelpful habits of thinking and behaving.
As you are still concerned, getting a second opinion is often a good idea, and good doctors would not be upset at such a suggestion. It can bring a fresh look at what might be wrong and at treatment options.
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