Elbear, I understand what you're going through. I went through a very similar period of emotional turmoil when I was in the process of coming to my senses. I didn't do pot, but I was drinking a lot. I once had a dream that Satan was showing me that the burning hell was real! I was in a constant state of panic, anxiety and fear about the future. I didn't know if I had the courage to do what I knew I needed to do to save my sanity.
I had help from friends. They could see that I was falling apart and reached out to me. I will be ever grateful to have had their support during the worst time of my life. I was paranoid that everyone could read my mind, but most people are thinking about themselves as it turns out.
I, too, recommend that you get professional counseling. If you're in college, there are often on-campus services with free counseling. Cut out the marijuana (or whatever was in those brownies) and get your own mind back. Doing things that are harmful to yourself won't help.
For the short term, just to get you calm and centered, I recommend that you google "Tao te-ching." The entire Tao is online and can be read on your computer screen and/or printed out. The Tao is an Asian philosophy book (very short) with 81 verses. It helps us to accept reality and stop fighting what we cannot do anything about. I read it when I'm anxious, and it calms me. Read whatever might help you, including the books recommended by the others here.
As Dorothy Sayer said, "Acceptance is the key to ease in life." Therefore, accept yourself for the wonderful person you are, and realize that it's fine that others don't agree with your views. Decide what you want out of life; then make a plan to achieve it. Your life is about you, no one else. Live it the way you choose. What others think of you does not matter. Living with yourself and understanding what is right and wrong (i.e., what is hurtful to yourself and others) are the things that matter.
After following the suggestiions posted here, check back in and let us know how your doing.
Welcome to the forum, the rest of your life, freedom and infinite possibility!