I did this myself for my Nokia Lumia 920. Same fault - the glass cracked but the digitizer and display were fine. Hair dryer, tweezers and a ton of patience. It took me four hours though, but it was a complete success.
If you're planning on doing this yourself, don't be tempted to buy an unbranded replacement - they may be fakes or poor quality reproductions (not gorilla glass, digitizer inaccurate, etc.) - My phone was a developer device but I replaced the screen with an AT&T branded one. The branded screens are usually genuine.
Simply obtaining branded hardware can be difficult -- I recently had to replace the full assembly on my Nexus 4, and in the process had 2 orders out of Shenzhen seized by customs, while a 3rd out of HK successfully shipped. This was all due to an LG logo that was only visible on the back of the part.
It sounds like you actually pried the glass off the digitizer. Is this the case? I've not tried this kind of repair yet, but I have a spare iphone here to attempt it on.
If you're planning on doing this yourself, don't be tempted to buy an unbranded replacement - they may be fakes or poor quality reproductions (not gorilla glass, digitizer inaccurate, etc.) - My phone was a developer device but I replaced the screen with an AT&T branded one. The branded screens are usually genuine.