HELP PROBLEM

I was making a Olympic pool out of quartz blocks which was 30x90. Once I was 10-15 blocks away from finishing, Minecraft crashed. Once I got back on, NOTHING SAVED AT ALL. Now I have to go back to the nether, mine at least 20 stacks of quarts, and go through another 4 Diamond pickaxes. What a waste of time!!!!!!!!!!!!!! It took so long, now I have to repeat the process all over again!!!!!!!!!!!!!!!!!???

Lakslausvsouslabsxk about Minecraft: Pocket Edition, v1.0.4