The way you say that (you haven't broken your back in 1 1/2 years) it seems like it's a regular occurrence! Maybe you ought to stop doing whatever it is that makes you keep breaking it.
I know my lower back is a mess. I even dread getting out of bed in the morning because I know by the time I get done bending and twisting to get dressed it will start to spasm. Sometimes even just standing up from the bed knocks me to my knees. Usually though once I get moving I'm OK. But occasionally I forget about it and do something stupid and it hits me again.