Can having fibromyalgia cause the body to shut down where you are unable to walk, get out of bed alone?

I 'm told that I have fibromyalgia but it has never been explained in the right way. I have done some reading and I don't think that is what I have. My body has been attacked to the point that at times I can't walk, get out of bed, just trying to get through the day can be very hard. So I just want to know if fibromyalgia can be that bad off.