Dids
unlucky- I sympathise
The NHS is not really geared up for treating backs in my experience (apart from dispensing the drugs
and also if they can spot the need for surgery
).
I've had 25 years of irregular chronic and acute lower back and 'hip'(sacro-iliac) and sciatic issues. Only now getting on top of it.
I'd get yourself to a decent Chiropractor or Osteopath (same thing really as long as they are good) Or a private physio who specialises in backs. Preferably one that offers needles (Dry Needles or Western Acupuncture). Don't wait for the slow NHS
I've suffered on and off for years with similar (5 years ago had issues for months, 2 years ago needed 2 poles to get up out of a chair or the car for 2 weeks - and on some hardcore painkillers and valium for spasms - a shorter 3 day period happened last year)
sciatica (leg pain) is a symptom of various issues.
e.g. If it moves around sometimes knee sometimes toes sometimes less) it could be a deep muscular issue - which won't show on an xray and can be just as painful as some disc/vertebrae problems -
If it goes always to one place it will probably be disc/nerve related.
the progression of the area of pain is a classic symptom of muscles tensing up over time to compensate for an injury to another area. I experience ityself if I neglect to go for a treatment after injury (caused by a few days of careless digging or lifting usually). In my experience the longer you leave it the more entrenched it will get.
After recovery, some sort of core strengthening work e.g. Pilates or Iyengar yoga (which has worked wonders for me) or certain types of careful gym work can help prevent further injury.
Good luck