I am now approaching 60 , and my experience with weed was during my junior high school years. Yes i can vividly remember being paranoid while smoking it. I gave it up completely after using for 4 years and have never gone back to using. It does affect people differently so if you are at all uncomfortable with it, or find you spend too much time day dreaming ,then say good bye .

Panic attacks r pretty normal 4 1st time users. I used weed for the first time while mixing it with ecstacy & thought I was dieing 4rm ecstasy when in fact I was just have panic attacks 4rm weed. The best thing to do is b in a comfortable setting with people you trust & to just chill out and keep your mind off of it. If you feel your heart rate rising & u start 2 feel hot take a sip of water & just tell yourself your fine.. Its just weed & it'll go away.
Hope this helps