Brandi....I guess the misalignment could be causing spasms but I suspect something else. As a seven-year sufferer of back pain, including many episodes of spasms, I can give you examples of other causes.
First of all, see a doctor so that you can get x-rays and an MRI. Once you have the pictures of your spine, then you can be referred to a specialist like an orthopedic back guy. If there is some abnormality in your discs, then treatment can begin.
Nerve involvement near the discs are many times the cause of extreme pain and spasms. The nerves may be compressed with age (you didn't say how old you were) or from sitting over the years. The discs press on the nerves and *voila* you have mucho pain and spasms.
I used to be paralyzed by the spasms and several times had to be taken home from work in a wheel chair. Not very good for my image as a former athlete. So I know what it's like to have to lay flat without moving for hours. Luckily, they do have pain medications and muscle relaxers to ease your pain.
However, until you know what is causing it, your doctor will not know how to proceed. There are also a variety of injections (steroids, nerve blocks, radiofrequency nerve ablation) that do provide relief. I would look into these with a pain management specialist before even considering any type of surgery.
Let me know if all of this makes sense or if I've forgotten to answer any questions you might have.
Good luck