Yes ma'am there are treatments available for anxiety and stress related issues. Though homeopathy system treats a patient as a whole rather than specific disease.
2. For time- it varies a lot from case to case and in general. Depending upon how long you have been suffering and eliminating or identifying the root cause of it.
Honestly speaking homeopathic medicines are milder and with least or no side-effects at all.
Next Steps
You can easily consult consult me and go ahead with the treatment.
Health Tips
Try to resolve the issue as early as possible as it's easier to treatin the initial stages with proper case taking. And if left untreated may lead to other major health issues later. Please try to do some exercise as in Pranayam regular basis . Or some physical exercises as exersise releases happy hormones in body.