Problems since stopping marajuana use

Hello everyone, I have just recently ( about 5 weeks ago) stopped smoking marajuana. Ever since I quit I have horrible panic attacks and neck tightness and throbbing in my head and sometimes in the right side of my cheast. Fora while i thought I was having a heart attack like everynight, now I am over that and I think i have some symptoms of a brain tumor. I know there is almost no chance at all of that happening, I am only 19 and I used to live at the gym and run and work my but off. Since stopping marajuana all i do is sit and think of all my symptoms and drive myself nuts. I am almost positive that i have nothing wrong with me but I could use some reasurement.

Lately i have been getting tightness in my back when i take a deep breath and my head is tight almost all the time and it throbs on the left side, when i think about it it is alot worse. The problem is i can't seem to stop thinking about it. I have no problems walking or talking or writing. I just can't seem to make myself happy lately and the more depressed i get the more symptoms i get. The mind is a very powerful thing and I would really aperaciate someone telling me how to break this cycle.

I'm a healthy 28 year old male and I have been a heavy pot smoker for about 10 years. About 3 years ago I also started having anxiety attacks and was freaked out about it just like you seem to be. The more people I talked to about it and the more I looked online, I started to realize that it is not uncommon at all for marijuana to cause anxiety disorders. My only advise is that it will get better as long as you stay off the buds and to try and stay positive. Start getting back to the gym, exercise can do wonders for your well being. Like you mentioned, the mind is very powerful and the more you freak yourself out about something, the worse your going to feel. Once again, this is only my advise, I'm not a doctor or anything but I know what your going through.