[CanadaSVT]

Too late for heat. Ice would be best for now (bag of frozen peas) and lay on the floor with it under you for 10 min every hour for until pain is reduced.
Stay away from any Chiropractor unless you want to be visiting them for the next few years or longer. Sport physiotherapist would be my best suggestion. Advil extra strength worked best for my pain.
When I killed my back I could barely walk and I was barely able to drive the SVTF 6speed home having to lift and push that damn clutch (back effected everything from there down and my lower torso was 6 inches to the right of center).
Real back pain is the worst! Best of luck.