I found I was irritable at first but it went away after a few days/weeks. Pot takes a long time to get out of your system. Exercise(lots of cardio), eat well and drink plenty of fluids and it will go quicker.
I found that I was noticeably quicker witted after a few weeks. I also became more sociable and stuff as well. I also found I had more ambition and a desire to work harder after a few weeks, as well as an increase in my libido.
Good luck.