Chosen Solution

The phone fell and cracked on the right side exactly in the middle. The top half appears fine but the bottom half flickers. Does that mean I need a new screen or do I need a new digitizer too?

You need to get the whole screen assembly replaced and it’s going to be fairly expensive as S7 edge is one of the most expensive for a screen replacement. $250 I estimate. If you want cheaper you’ll have to find someone that does the glass only replacements for them if the glass only is broken.