Yeah you can get as few as you want, i'm a pharmacy technician and people do that all the time, because the cost of medicine is so high.
Also you said you were on paxil cr, if your doctor would change your script to paxil, you could fill it with a generic and it would be even cheaper. The paxil cr is not available in generic,but is pretty much the same as the plain paxil,the cr is an extended release,but really it just allows the company to keep their patent a little longer and make a few more dollars. Hope this helps. Get healthy.