Take a breath man. First off, if you could write a bit more clearly and less cluttered I and others would have a bit easier of a time reading it lol.
There are only a few things it could be and I believe they have already been covered. Once you get the new sending unit rewire it to the guage and the wires from the guage elsewhere and you should be good to go.
BTW I havent had a gas guage for over a year . . . nothing to freak out about