Thanks for posting your query.
There is nothing called as natural medicines to manage stress
and ensure sleep.
What you can do to solve these two problems naturally is to take a balance diet with less spice and do a regular exercises to relax the body and mind.
The spirituality and yoga
sessions can also help.
If still the trouble remains then stop junk therapies and review to a psychiatrist
, he would advise you appropriate treatment. Mostly the stress and sleep can be ensured with the same medicines and both the problems are curable with modern medicine system.
Hope I have answered your query.
If you have any questions I will be happy to answer.
Please close the query if you have no other questions.
Wish you a good health.