Marijuana.com

lightweight4

I started smoking about 6 months ago. I would smoke once every other day (3-5 times a week) Ive had to stop because my grades in school have been slipping, so I have decided to postpone until I have vacation. Its been almost 2 weeks since I have quit but I feel as if Im having more problems now. I cant concnetrate in class or studying and I find it difficult to focus on several things at once like I used to. Is this feeling normal and how long does it take to pass? Also, can someone tell me if this is the lasting effects of marijuana leaving my system or is it all in my head?