In reply to peetay:
Firstly, yes, they can tell without MRI or Xray. In fact they don't use either, because pretty much everyone over the age of 25 has some degree of disc bulge and you can't tell what's new and what's old on scans. This comes from my cousin who's a physio.
I completely ruptured 2 discs in my back at the start of Oct 2010, with fluid leaking into my spine, and causing me to act as if tasered at random moments (I'd be walking/limping along then feel an electric shock type pain and fall).
I took complete rest (lying flat on a thermarest on the floor most of the time, with very gentle exercise movements). After about 4 days I could walk again, and had a 10 week programme of physio and acupuncture. My cousin said I would not be climbing or skiing that winter, and could probably only do gentle walks. I went back to work after 2 weeks and the management let me work on a car for a few weeks rather than an ambulance so I wouldn't have to lift patients. After any activity, be that work or housework, I'd lie flat on the thermarest dosed up on painkillers for a while.
Anyway... with lots of physio, I went for a walk up Helvellyn in the last weekend of November 2010, carrying a light pack. I was skiing by early January 2011, and winter climbing by late Jan.
My advice would be to take it very easy, accept that if you DO do any activity, you may pay for it in increased recovery time and/or having to rest for ages afterwards (for me it was worth it).
I still have times now where I feel twinges, but nothing like being tasered anymore. I can walk, run and climb, but I can't stand still for very long without pain. I can deal with that - I'd rather be active anyway, but it hurts if I stand in queues for anything for more than 15mins or so.
If you can currently walk without too much pain or collapsing, it sounds as if your injury isn't as bad as the one I had, and hopefully you'll have a better and more complete recovery