Right...I will give it to you straight. It is HORRIBLE... but it is worth it. You will feel like shit for two weeks, but then you will feel normal again.
I was 20 and I found the worst bit was referred pain in my ear...random but true. It was like the worst ear ache ever.
Also, I could only eat room temperature food. Anything hot or cold caused horrid pain. I actually cried at one point because my mum bought me expensive ice-cream and I couldn't eat it.
Oh, and you will be sick when you wake up, and it will be full of blood, but don't panic like I did... it's normal. It doesn't mean you're bleeding to death!
Buy lots of trashy magazines and keep a duvet downstairs for comfy snuggling. Good luck!