Is calming chronic stress by dr,bell a good natural choice for stress and anxiety? how long should it take to see a difference?

No way to tell : Unfortunately, dietary supplements are regulated as foods (as opposed to drugs). As such, they are not required to undergo the same testing (or prove their claims to be true). Also, since no third party testing of their product is required - the ingredients listed don't even have to match what is in the bottle. Wish I had a better answer ... Good luck!

Therapy?: Self help books often only go so far. Have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as depression is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room.