Sorry, you provided so much information about the problem that I can't sort it all out.
have you checked the blinker fluid? and the muffler bearings, when was the last time they were changed? well thats a couple places to start duff, good luck.
Did you shift out of 1st gear?
Here is a guy that helps out when others need help & you guys can't even give him a good starting point.
Start by looking at the loose nut behind the wheel then go from there