I actually did not start to feel the true side effects of Marijuana until I quit smoking the drug. It is crazy how this plant works, as long as it is in your system, you feel fine and normal. However, when you quit for a couple weeks, the side effects (that by the way have been their the whole time but covered up by the weed) start to surface.
I remember two weeks after quitting weed I felt great, normal like I never smoked in my life. Funny enough, one week later I was hit by random feelings of anxiety, depression, and paranoia. Marijuana alters brain chemistry dramatically and its effects don't start to surface until one of the two things happen:
1.) You quit, and the effects that it created in you (that were hidden up by medicating with weed) start to show up. It is crazy how Marijuana works, it alleviates and medicates the same ailments that it causes. (which is dangerous IMO because you don't know you have these symptoms in the first place, which is why most hardcore stoners always say "they are completely fine".
2.) When your body and brain has had enough. Generally, this is the rougher route. Usually is caused by smoking every single day and staying high for most of your regular life until your body releases all of the symptoms that were piled up on at once (panic attacks, paranoia, delusions, and usually Depersonalization/Derealization)
I used to be a big Marijuana smoker, and am in full support of Medical Marijuana inititatives because I do see medicinal purposes in the plant, however when it comes to full scale legalization for recreational purposes, I am not in support of it. The reason being is that alcohol has a UNIVERSALLY (for the most part) same effect on human mental function. In other words, we know what is going to happen when you drink alcohol.
Marijuana and Psychadelics do not work the same way. There are many stories on the internet of people who tried weed one time in their life and are now living life long depersonalization disorders. Very sad actually. There is no universal way to predict how your body is going to react when you consume THC.