Glacierwolf
Sorry - but nobody here can help you because you did not provide anywhere near enough information. That is like saying your car wont start - and we have no clue if the key fits or it's out of gas - or the 20 other things inbetween that could be the issue.
Since it appears you are not mechanically inclined - you should just bring it to a gunsmith. Pay the $35 to have him check it out.
Nice Guy
You should immediately trade it in at first opportunity and purchase something more in line with your mental level. I recommend a rubber fork. Because you should not own a firearm.
Coffee Drinker
I have no idea what your skill level is regarding firearm repairs, but since you just admitted you have no clue what happened to the gun, my guess is that you aren't capable of fixing it yourself.
Its probably time for a trip to the local gun shop.
Jim W
Take it to the local gunsmith. The usual problem is different for each shotgun.
Lime Green Medic
Apparently the nut behind the trigger has worked itself loose.