So, physio yesterday afternoon and VERY happy to report i am feeling MUCH better and have the OK to go back to training, upper body only, no squats or deads, another appt saturday @ 11am.
Going to train a few sessions @ 50% to make sure there are no issues, following that will increase if feeling confident and dont experience any dramas.
Over a week gone and passed since the original incident, have loosened up hamstrings and improved ROM significantly, spazm in back (caused by sprain) has all but disappeared. Turns out I have a slightly rotated pelvis on my right hand side due to poor ROM (formerly in hamstrings) and also foremost in my right quad (which is apparently really tight) and the "pop" i heard was my sacroilliac joint and its nothing to be overly concerned about once my flexibility / ROM improves that will disappear.
Spoke to physio RE: chiro alignment, he said to me "you can have all the alignments under the sun its not going to help" which of course made sense once i was given the diagnosis as its obviously a muscular inbalance issue so i now have more stretches to do, some pelvic floor exercises and also some core exercises to do 2/3 x per day. He then proceeded to say "if you want an alignment, i'll give you an alignment like you've never had" which made me laugh but sure enough he did give me an alignment while i was there and i do feel much better, and much more confident with my back in comparison to this time last week.
Hopefully Saturday i will get the OK to go back to leg work / squatting / deadlifting but that has been discontinued for now.
Looking forward to lifting today.
Thanks to all peeps for reading / following / posting in this thread, all advice was taken on board and well wished etc much appreciated. Fingers crossed for the all clear come Saturday.
Will post up how i go after next session
Cheers