Feeling you're isolated and that no-one understands what you've been through makes it so much harder to come to terms with the trauma of surviving critical illness. This is where support groups can help. Talking to people who've been through similar experiences, who are further down their recovery journey can help you realise that what you feel and think is normal for someone who's been critically ill, and usually gets better.
Simply being able to talk with people who actually understand you because they've been there too can go a long way to help survivors put their experience behind them and get their normal lives back. You may even be able to help other more recent patients as your own recovery progresses.