If you're dealing with personal health information (PHI), I would advise you to temporarily close your site and hire a lawyer straight away. Whenever you touch this kind of data, regulatory regimes like HIPAA may apply, and you need to be extremely careful. There's not a HIPAA compliance or even a privacy policy statement available on your front page. See https://www.hhs.gov/hipaa/for-professionals/privacy/laws-reg..…
My understanding is you're an actual attorney, yes?
Can you shed any light on this area...? My understanding is HIPAA and similar laws aren't applied as a result of a user disclosing their own information for their own purposes. For example, you can freely put your own personal medical information into Google Docs, Apple Notes, Facebook post, X tweet, Excel spreadsheet, etc.
I ask because Kate's App is similar in ways to my app BoldContacts, which is helps people care for their parents and disabled loved ones. I strongly believe that these kinds of apps need some kinds of privacy protections that are lighter-weight than HIPAA. I haven't yet found a perfect answer.