Teary.
I'm so very sorry that this has happened to you...
Others have given you advice that you can follow up on as soon as you can.
I'd like to ask if you gave any of them written permission to contact a specific family member or friend. Rather like an emergency contact...especially if you were a danger to yourself or another person.
Do check in with the mental health advocacy group/NAMI. They will be able to at least advise you of any pertinent state or federal laws.

It's highly unusual for a home visit like this--are you in the States?
If not there will still be resources to help you.
The fact that they left without pursuing further action is troubling and certainly does not follow any professional standards...I don't think that much has changed since I left the mental health field.

Please keep posting, Teary, and let us know how you are doing, ok?
Chat or PM anyone who you feel comfortable talking with...
Posting here will also help get those feelings out, and you'll receive support and encouragement from us.

Best wishes,
Catherine