Chunks not loading/rendering properly

I was just playing normally, then i decided to up my render distance from 15 to 25. This caused a massive glitch where i had lava, water and normal land moving up and down.
I then reloaded miinecraft and i was in the desert. I was walking towards my house and the chunks weren't loading/rendering properly. As a result, i was left with a small area of land that was loaded properly. Surrounding this area of land was basically 'the void'. There was no sky in my world, just blackness, like if i was in The End.
This is one of my best worlds and would hate to loose it. So please help, i will do my best to help you with anything you may need.