I work for a landscaper in MA and was injured three weeks ago and haven't been able to work since then. My boss sent me up on a rock ledge to clean out some weeds that were growing there and it was almost ten feet off the ground. I slipped on the wet rock and injured by knee pretty bad when I hit the ground. I had emergency room bills insurance didn't pay and I lost work time because I told him I couldn't work for a while and he said I wouldn't get paid if I didn't work. How long do I have to sue him.