Go and see a physio! Your GP should refer you for a prolapsed disc as it can be debilitating.
The manipulation helps, but more importantly they'll show you the excercises to strengthen your back. I prolapsed a disc, then repeated it a couple of years later. Once it's done there's a very good chance it will happen again.
I'm now "tuned" to recognise the indicators though and do my excercises right away. It's the stupidest things that trigger it – for me it was 1) picking up a towel off the floor, 2) sneezing (as daft as it sounds).
Do the excercises and it's manageable as a condition, and I rarely get any pain.
Hope you have a speedy recovery!