You can try this link to 2-1-1 Information and Referral Search which is a program funded by the United Way: http://www.211.org/ In some areas you can even call 2-1-1 on your phone and be put in touch with the necessary service. However, if you are on a medical plan, that would be the first place to start. Just call their number and speak to an operator. That person should be able to direct your call to the right department.
they would send an officer out to check on you and since he won't want to have any chance of liability on his part, he would most likely call the coroner's office for emergency committal, meaning 72 hours of observation in the psych ward of the nearest hospital.