#1 you can help yourself by knocking off the weed. It will only make it worse.
#2 there are so many symptoms of anxiety, but I can give you the ones i've experienced myself:
- trouble sleeping (usually jerk myself awake right before falling asleep)
- what seems like trouble breathing (like you really have to think about it to make yourself breathe)
- hypochondria
- headaches of a couple varieties (for me, usually tension, like you're wearing a really tight cap, or ear muffs)
- avoidant behavior (when you make up excuses not to do something or go somewhere out of fear)
- social phobias
there are lots more that other people might experience that I haven't, and vice versa. It's all a matter of how your body and mind deal with the excess stress. (smoking weed may sound relaxing, but...It's often not!)