I do voluntary work myself and had to fill out medical forms and have a background check done and stuff so there's nothing unusual about that, I can understand you being anxious and stuff but were you honest when filling in the form?? iit's better to be upfront about these things so they can support you better when you need it too.
Having been in hospital or whatever wont necessarily be a barrier to you doing voluntary work it means you have life experience which you can use to help others who have been through or are going through what you have, it's my life experience that helps me with my voluntary work so don't worry about it too much ok
