You poor thing, I hate vomiting!!!

A dr doesn't have to refer you to a physio, you can just make an appointment yourself. Most dr's don't actually know what physios really can do. Unfortunately studies have shown that with back pain, seeing a dr is generally about as effective as doing nothing! Sad but true, and primarily because dr's are often so busy that they are interested in making sure it isn't anything serious (like a tumour) and providing some pain relief because thats what people want (relief from pain I mean). They don't have the time to really delve into the nitty gritty of the underlying cause and provide treatment to that cause - that's why we have physio's! (And chiros and osteos etc).

Does your back feel stiff too? Are you limited in what you can do? Does your back get stiffer as the day goes on? How far down your leg/s do you get pain?