I am so sorry you're getting treated this way, my dear.
Unfortunately, the part you were told about having something to tell you to do is pretty much true. Bedrest is completely unproven as any help in premature labor situations. However, it hasn't been disproven. And the simple fact that you stopped contracting is enough evidence that it was accomplishing something for you. Many doctors will "prescribe" it because it's the "done" thing, and if it might possibly help, then why not... plus it can be used as a work excuse, where otherwise someone might have to risk losing their job (if they're just told to "take it easy").
I will say that from your original post, it sounded like maybe your water breaking was just a trickle and not a flood? In which case, it is completely possible that it resealed. A leak like that can happen, reseal and leave no evidence, and unfortunately the doctors act like you're whacko. I had a friend go through the same thing (almost to term), she was leaking, but by the time she got to the hospital (attempted HB) it had stopped and they all treated her like a moron.
There is a simple test that you can do at home with pH paper, which you should be able to find at a pharmacy. Amniotic fluid has a pH around 7, whereas discharge will be lower, around 4, urine is in the same range as AF, but should smell of ammonia whereas AF will smell a bit sweet. It may save you the drive, and regardless you'll have something definitive to tell them when they look at you like a loon.
Definitely try to find a doctor that's going to be honest with you though. One who isn't going to really tell you what is going on when you're obviously experiencing some possibly traumatic difficulties with this pregnancy is of no help whatsoever.