Now that you've had time to calm down and really think about what happened, I think you would find it useful to look through the information in this thread: Avoiding Criminal Assaults -- Presentation at 17th TCHA Conf
This is a strategy and some tactics for dealing with exactly the sort of situation you encountered. You already know the first couple steps of this; I think having experienced this event for real, you will see some other tactics that make sense and will help you if you ever are faced with this again. I don't know where you live, but there are chances to practice this with others in the Austin area, and this will be a great chance to work in it and other things as well: viewtopic.php?f=8&t=72051&hilit=avoidin ... al+assault" onclick="window.open(this.href);return false;
Is a .380 caliber enough gun? I would prefer a 9mm, but more important is that you are able to recognize whether or not there is a threat, be able to avoid/evade it if possible, the degree of response you should provide if you can't, be able to access the right weapon (from fist to pepper spray to knife to gun) when needed, and finally to be able to reliably and accurately place bullets on the threat until he's not a threat any more. If you are comfortable with your Sig, it is absolutely reliable, you can access it when needed, and can put enough rounds on target with it, then it is enough gun. I would be more concerned about limited capacity than caliber.
Again, you did great.
