Well personally I find a great way to help my self calm down a little is various teas, although I appreciate it's not everyone's cup of tea (sorry its a terrible pun I know). There are a few points to making the tea though that are kind of important in my opinion. Number one obviously find something that works for you there are plenty of relaxing herbs out there but if the taste makes you cringe then it's probably best you find an alternative, personally I quite like a bit of a bizarre mix of mint and lavender. Also make sure to brew it right, the brewing is half the secret to relaxing with it, take your time to ensure you get the best possible result. I like to use fresh herbs but dried work just as well, just add less of them.
As I said this might not be the best solution for you but it works miracles for me when im all emotionally overloaded like that so I thought I'd share it just in case.