Camomile and peppermint tea
It's mostly herbal tea. Camomile is the best but it is dependant on taste.
Chamomile tea and peppermint tea will help to calm you
I heard about Kin, it's the first drink of a newly invented category of functional beverages called “euphorics.”
Euphorics work primarily on your willpower, your might, your seratonin levels; your ability to be polite and charming, or to deal with assholes.
Euphorics replenish and rebalance the endocrine system naturally, through a mixture of nootropics, adaptogens and botanics.
I don't know if it works but it could be interesting to try!
Chamomile tea is a good one :)