One thing to consider is about pot and other drugs, is it commonly puts people in a very introverted state, where your more 'in your head' and thinking about things deeper, more considerately, and willing to think further into things than you are otherwise.
This does help alot of people accept and manage psychological issues, especially by allowing them to think in perspectives they hadn't before, aiding them in coming to resolutions and gaining closure on issues, or managing their understanding of them in a less one sided manner than life commonly leaves us seeing things. And generally, it does have quite the reputation for calming people down
That being said, as Chris Herzog and Chris Odell mentioned:
Strong doses can cause panic attacks in people not used to the experience, for this reason you should avoid edibles because of their potency and if you smoke, just take one hit or so and leave it at that, keep the dose low and controlled for optimal benefit. As herzog suggested, indica strains generally make you more calm tired and relaxed and sativas present more of an active high in comparison, so if you can get an indica, but if your not in a state like cali it can be difficult to procure either in specific rather than just 'some pot'.
Its also strongly suggested to be in the company of some good friends who you can trust and care about you, and in a setting you are comfortable and framilier with, so that you feel comfortable in your environment.