You already know how dangerous anger can be. I would suggest getting into therapy again. It sounds to me that there must be another underlying cause of such violent anger. You should probably get a physical also.

As a student, can you not go for counseling for free?

Getting that angry over something like you described.....doesn't fit, so I would want to know what is fueling that kind of rage.

Someone else's life or yours may depend on you getting help.