You're probably feeling guilty because you got mad. Such is life. When people die for example, we can be filled with doubts and regrets about our own actions. The kind of "If only.." thoughts.
I do believe we can create bad situations from our will, but I doubt this is what happened. You're probably just a nice person who tends to take a lot of grief, and because the one time you got mad something went wrong, you feel responsible. You're not. It's just the luck of the draw hun.
I don't know about the other times as you didn't clarify, but when your default emotion wavers around guilt, and people are often negative towards you, coincidences can be frightening.
Try doing a family healing spell, and practice some positive affirmation for your personal emotional wellbeing. :)