Nexus 4. Screen cracked back cracked. Screen non responsive help?

k had my phone o charge overnight like I always do but last night my dgo knocked it off my kicthen
table and now the from screen has a load of cracks :crying:

The back also has been cracked but that was from before and the phone worked just fine, now that
the front has been cracked the phone no longer can be used. The botom half is non resposive at all.

I have looked about the net for a replacemeant screen & back (back not as important) but there are
soooo many!! Some seem cheap and look like a great deal but im not sure if I should buy a screen
from ebay cheap or look at something else?? Can anyone help me out? Like coud I do this D.I.Y?
Also if I am going to buy the back too, I seen a white back but it was sold, were would I find one?

Please help all. I have no phone now and cant afford another right now.

Thanks k :good: