these are common side effects of weed for some people , the anxiety/paranoia shaking/trembling, shortness of breath, plus the friggin' fact you blazed the fuck out the first time. Dont worry it'll go away as you begin to smoke more and more, but hell i miss the trips i got when smoking the first couple of times. I remember when i began smoking i smoked out with these two rastafarians that lived in the boonies. I knew them from high school and they always would try and persuade me to smoke so i did. The only thing i didn't know is they had some dank-ass bud from Kona and we did bongloads w/ 2 fatty doobies,it was so intense, kool thing was i had the best first smoke experience , this guy's room we smoked in was a true tokers room, rasta memorabilia all over the place wierd ass lighting and bob marley tributes all over so when i was tripping i was like iron like a lion in zion. that turned me on so much to bud, i've been toking out everyday for the past 4 years, got through highschool and halfway through college blazed. Kool thing is i learned the in/outs of the bud business when i first started my friends were true stoners to begin with so i've never really touched schwag that much , i burnt a quarter of Kona Gold my first time out of 3 peeps, so yea keep on tokin