My camera won't display pictures back that I've taken. Is there a way to recover photos from memory vard?

I'd recommend that you use asoftech photo recovery which helped me before, this picture recovery program is very good for recovering photos from memory card
http://www.asoftech.com/apr/

Your pictures got corrupted somehow. You can recover pictures from memory card with photo recovery software. Tenorshare Data Recovery is a professional data recovery software that can recover lost, corrupted,deleted or formatted pictures from memory card of digital camera.
But you had better have stopped using the memory card of your camera. Because, once your pictures were overwritten by new ones, they are gone for good.

Here is a tutorial to guide you how to recover pictures from memory card.

Is this camera memory card damaged somehow? Check it on your computer with some diagnostic tool?
If not, just try it quickly.
As to your card pictures, insert this card to your computer with card Reader and download camera memory card data recovery software to see whether your lost pictures could be scanned and retrieved step by step.
Never save anything new on this camera card and also make card data backups from now on.
Read more detailed information to rescue your card stuffs:
Memory card format recovery
Lost memory card photo recovery

Are you sure you've saved these newly taken pictures on the memory card of this camera?
If you are, your camera memory card may get some problems.
Try to insert this memory card to your computer and see whether it can work well here.
If this memory card can be read functionally there, you'd better back up every photo well and try to format it to see whether its problem can be fixed.
But, if you also get the same memory card error, you'd better apply a photo recovery freeware to firstly restore your wanted photos back:
http://www.freeware-fix.blogspot.com/2013/02/photo-recovery.html
This photo recovery freeware has offered you four data recovery options for you to process almost all data recovery problems, such as "Deep Scan Recovery", "Advanced File Recovery" and "Format Recovery", etc. In your case, the former two can be good choices for you.
So, read more information of this freeware here:
http://www.freeware-fix.blogspot.com/2013/04/data-recovery.html

Note: You should never be so careless about your important data and always back it up well at least on two memory cards or drives.

Accidental deletion, mishandling of devices, corruption in memory card or any other kind of software problem can be effectively resolved with this photo recovery tool.
http://www.camerarecovery.org/