lower back pain

[elite-2011]

hey

around a month ago i started to have a slight pain in my lower back
but it seem to go just as fast as it came
now it seems to just come and go .. and when i get it it comes on strong
and it makes it hard to do anything
here is some info on me and the pain i am having

age - 19
pain - lower back
where - feels like its on the spine

i have it right now and the best way to describe it is
1) when it first comes its mild and easy to cope with
2) after a short time the pain starts to get worse
3) even with a535 / pain killers / heating pad it still makes it hard to do anything
4) when i take a deep breath it seems to make it hurt more while i inhale
5) no matter when i do sleep seems to be impossible when i get it at night

it doesn't seem to last to long .. even tho it feels like it at the time
pain sticks around 4 - 6 hours and then just seems to fade away
heating pad does seem to help after using it for a few hours
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now i know the smart thing here to do would be to go see a doctor
but right now that is not an option
i am from the uk and i am in canada on a visa
i looked in to going to a doctor and they wanted $200 just for me to see one at the walk in

more info on me that could have started it

around 5 years ago i was in a car crash with a friend of mine
the car went at just a little 50mph in to a lamp post
i came out of it 100 fine and with out a scratch .. but my back did start to ache a short while after that and then it just went away
the doctor said that it was nothing and i shouldn't worry about it .. gave me some pain med's and sent me on my way