Post-Basic Training emotional issues?

I graduated at Fort Knox as a Cavalry Scout (19D) last November. Since then, I'm having a lot of emotional problems. I basically get really pissed off and I'm easily agitated. I also never seem to be please or happy with anything. Could BCT be to blame? I feel like I had a pretty positive training experience, I never got hurt, I was PG for a good amount of time, my Drill Sergeants liked me, and I never got into any fights or anything. Anyone else encounter these issues or know what could be the reasoning?