Had Heart Attack Now I'm Angry!

Two weeks ago today I had my first heart attack. Cold sweats, chest pressure, pain in left shoulder and arm...Went to the hospital and they found 85% blockage which required a heart cath, angioplasty, stent, and what was called a balloon which was placed in my leg for 24 hours.

I take full responsibility for my heart attack. I played the odd's and lost. Smoke, drink, little to no exercise....I'm 45 years old, yeah now it seems pretty stupid.

It's now two weeks later i'm healthier, i'm exercising, watching my diet, not smoking, not drinking, and am finding myself mad as hell! Nothing specific just mad. I'm not upset with anything or anyone, nor do I take it out on anyone except perhaps myself by pushing myself during my workouts. I find that this anger is demotivating to where I don't seem to care too much about anything including my work.

Is this normal? Does it pass? Is it a side affect of a med? Just curious.

Thanks,
mike