The thing about cannabis is that it sharpens your perception of whatever you put your attention on: food, music, sex, dancing, etc. You were putting your attention on your thoughts. And those thoughts turned into a negative spiral.

Now, I'm going to say something here which may be something that you have not heard before, but I have found very useful when dealing with negative thoughts. And that is this: just because the thoughts are there in my head, does not mean that they have anything to do with what I really am. I remember that there is someone who is observing the thoughts, and that someone is me. I am not my thoughts. I am the observer of my thoughts. This observer never changes, is pure consciousness, and is always free and perfect.

But I tend to identify with my thoughts (as I identify with my body). I want to protect my body from perceived threats: political, social, physical. And as a result I will try to develop strategies to "save myself." In fact, I am just trying to save my body, which is a hopeless task, as the body is just born to die. BUT: I am not my body. I am that which observes my body.

So, my advice to you is to turn your attention away from the content of your thoughts, which, after all is just a set of stories that you are telling yourself, and instead, put your attention on the one who is telling the stories. Your Self. This sense of I AM, this observer, is always the same, has always been the same (at the age of three, fifteen, twenty -- and will be the same at forty, fifty-six and ninety). You can not describe this observer Self, because it is pure awareness. You can only describe it as not being this or that.

You are nothing that you can conceive of or perceive.

And this pure awareness can never be hurt, can never be sick, can never die. This awareness is who you really are. Trust me. Put your attention on that awareness. Whenever you have a negative thought, or worry, ask yourself: Who is having this thought? How is this 'awareness' going to be affected?

Remember, every night you go to sleep, you are willing and happy to let go of your stories, and your thoughts. And in the morning you wake refreshed. You can find that same refreshment, by letting go of your thoughts and stories during the day. Notice them, yes, and then immediately turn your attention to the one who is observing the thoughts -- to the awareness behind the thoughts.

You will be amazed at the results.

Best of luck to you, my friend.