Yes by all means obtain a Lawyer who specializes in workman related accidents.  It will be to your advantage. I also recommend that if your doing any thing out side, like putting out or bringing trash barrels or any heavy lifting, to not do it.  Once you obtain an attorney they will be watching you and taking pictures of you.  Even bringing in grocery Anything you do with your injured arm.  They want pictures.  They can photograph you from several blocks away or from the air.   You must not use that arm for anything.  Good Luck and Hang in there.  Remember they may all ready be watching you.