Hi. Ok. First thing, try not to worry. I know that's easier said than done and it's no help. You say you know they're going to take it off you - you know nothing of the sort. It's natural to be worried, honestly I understand. But things could go well. Reviews take months. You could worry yourself for months and it all be for nothing. Or, if it is bad news, youlll be in no position to fight it. The best thing to do is look after you. Eat, socialise, try and try not to worry. Worrying will not help anything. If you look after yourself, you'll be better placed if you do need to fight things.
If you do get disallowed at review, it stops right then.
How far into the process are you? I work with PIP and deal with queries daily. I know it's a frustrating and frightening system, and I'm more than happy to help. If you want to PM me with details I'll help however I can and give any advice I can.
The important thing is to get evidence. I don't know if you've done the review form, but either way it's all based on now. Any evidence from the time of your original claim won't be counted. I understand if you'll have this condition for life, but you still need evidence. You need to show that your condition affects your daily life in xyz way. The more evidence the better. They includes letters, reports, prescriptiond etc, you can't send too much.
In terms of the address to send it to. Ring up and ask them, there's different ones depending on where you live. Id have a look for you but I'm off til next Tuesday and really it's best to send stuff asap.
PM me if you like