OP, I've broken my thumb AND burnt all ten fingertips before. It really makes you realize how much you use your thumbs/fingertips for when you can't tie laces, undo buttons, etc. XD
Op as #13 said, you only know how hard it is when you don't have both hands (paraphrase).
I'm a left hand amputee and have been through this. You can do this. I have to live this forever, but you will heal. Look to that and don't let it get you down. Life is a learning experience if you let it. You will get passed this, but it will be a lesson you will never forget.
Hint: use your non-stitched hand for butt-wiping.
Don't forget to use the toilet paper.