The odds are good here, too. Employers won’t want to go through the process of taking on and training brand new paralegals if they can help it, so as long as you aren’t a screw-up, consider your job secure. If you’re not sure whether or not you’re a screw-up, please see the definition here. (link: http://dictionary.reference.com/browse/screw-up)
It might be less about your firm letting you go and more about you hanging on. Do you want to keep working as hard as you do for less than lawyer money? Is it time to suck it up and go back to law school? Is it too late to get your old garage band back together?