I have major vibration in by weedeater. After only afew minutes I have to let turn it off. I can't get any work done it feels like it is going to break into pieces

Weedeater brand weedeater right? OK, could be the engine isn't secure in place, flywheel has broken a piece off, or is misbalanced, or it was dropped maybe? something's causing it. Is it new, or a couple years of age? When did it happen? If it gets down to you can't fix it or don't know what's going on, get a small engine shop to see the problem, if its too much, these tiny trimmers are fairly cheap to replace rather then fix most of the time.