coffeeking
Those were my symptoms EXACTLY, it was moving a fridge that did it for me.
One visit to the osteopath and he found my pelvis our of alighnment and clicked it back in, immediate relief. Now regular application of ice (10 mins on, 20 mins off) and 2 more visits and I'm pretty much back to normal.
If you don't deal with the root cause of the issue it will come back.
IME GPs are very hit and miss with back pain, the fact that he checked your spine and didn't even consider your pelvis (major cause of lower back pain) says it all really…
Osteopaths can now be referred to by the GP however if I was you I would spend the 40 quid and get myself to an osteopath asap.